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Unofficial practice · EUEE

2017 E.C. Biology EUEE past paper

65 questions · 2017 E.C. / 2025 G.C. · Natural stream · unofficial

Unofficial practice for the 2017 E.C. / 2025 G.C. Biology Ethiopian University Entrance Exam (EUEE / matric). 65 question stems from the Abrari bank are listed below. Not an official Ministry, EAES, MoLS, or OCACC paper.

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Unofficial EUEE past-paper items. Not an official key.

1 / 5biologyEthiopian biology institutes

Which one of the following Ethiopian biological research institutes is known for housing a major gene bank in Africa?

Unofficial practice. Abrari is an independent study aid and is not affiliated with, endorsed by, or an official product of the Ethiopian Ministry of Education (MoE), EAES, MoLS, or OCACC. Answers are Abrari keys, not an official marking scheme.

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Questions on this paper

Stems are visible for study. Worked solutions stay inside each item and are unofficial.

Q1 · Ethiopian biology institutes

Which one of the following Ethiopian biological research institutes is known for housing a major gene bank in Africa?
  1. A. Addis Ababa University Biology Department
  2. B. Institute of Biodiversity Conservation
  3. C. Aklilu Lemma Institute of Pathobiology
  4. D. Armauer Hansen Research Institute
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q2 · Microscopy

A grade 12 student marked two dots close to each other using a pen on a piece of paper and observed them under a microscope. The two dots appeared well separated under the microscope. This was due to
  1. A. resolution
  2. B. magnification
  3. C. staining
  4. D. mounting
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q3 · Cell biology

From the following alternatives select the common features that are found both in animal and plant cells.
  1. A. Cell membrane, nucleus, cytoplasm, lysosome and Golgi apparatus
  2. B. Cell membrane, nucleus, cytoplasm, mitochondria and endoplasmic reticulum
  3. C. Cell membrane, nucleus, cytoplasm, chloroplast and Golgi apparatus
  4. D. Cell membrane, nucleus, cytoplasm, large vacuole and Golgi apparatus
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q4 · Osmosis / tonicity

A biology teacher grouped his students into two groups and ordered group I to place a slice of potato in hypertonic solution and group II in hypotonic solution. What will happen to the potato slice in group I and group II?
  1. A. turgid while for group II it will be flaccid.
  2. B. haemolyzed while for group II it will be flaccid.
  3. C. flaccid while for group II it will be turgid.
  4. D. turgid while for group II there will be no change.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q5 · Nutrition / balanced diet

A man eats only vegetables, beans, banana and orange for one week continuously in his lunch and dinner. For this man, what nutrients are most likely missed in his meal to be a balanced diet?
  1. A. Carbohydrates
  2. B. Lipids
  3. C. Proteins
  4. D. Minerals
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q6 · Digestion / absorption

Which of the following is correct about the process of digestion or absorption of food in the small intestine?
  1. A. Proteins are converted into amino acids by the action of hydrochloric acid and amylase.
  2. B. Bile emulsifies fats to increase the surface area to make it easier for lipase.
  3. C. Water is reabsorbed into the small intestine and metabolic wastes are excreted.
  4. D. Glucose and non-hydrolyzed starch molecules are absorbed through the lacteal.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q7 · Enzymatic digestion / food tests

In an experiment, students wanted to prove that enzymatic digestion begins in the mouth using certain chewed food coated with their own saliva. In order to get a positive result for their experiment, what type of food sample and testing solution should the students use?
  1. A. Potato and iodine solution
  2. B. Meat and Benedict's solution
  3. C. Fish and sodium hydroxide solution
  4. D. Bread and copper sulphate solution
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q8 · Respiratory gas exchange

Compared to the inhaled air, what are the percentage of nitrogen, oxygen and carbon dioxide gases in exhaled air, respectively?
  1. A. 80%, 16% and 4%
  2. B. 80%, 4% and 16%
  3. C. 16%, 4% and 80%
  4. D. 4%, 16% and 80%
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q9 · Respiration experiments

Three students carried out different experiments in exhaled air as indicated below. Student I – uses cold glass and blue cobalt chloride paper; Student II – uses ice cubes; Student III – uses tube containing lime solution and straw. Based on their setup, which student plans to demonstrate the presence of water vapour and carbon dioxide, respectively?
  1. A. II and III
  2. B. I and II
  3. C. II and I
  4. D. I and III
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q10 · Minerals / nutrition

If your body cannot make enough red blood cells, which one of the following mineral-rich foods can correct this problem?
  1. A. Iron-rich food
  2. B. Calcium-rich food
  3. C. Iodine-rich food
  4. D. Sodium-rich food
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q11 · Binomial nomenclature

A biology teacher provided common names of three organisms: human being, dog and housefly, to his students to write the correct scientific names of each organism. In which of the following ways should the students write the correct scientific names, respectively?
  1. A. Homo Sapiens, Canis Familiaris and Musca Domestica
  2. B. Homo sapiens, Canis familiaris and Musca domestica
  3. C. homo sapiens, Canis familiaris and Musca domestica
  4. D. Homo sapiens, Canis familiaris and musca domestica
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q12 · Plant classification

Identify the typical examples for division Gymnospermae and Angiospermae, respectively?
  1. A. Mosses and ferns
  2. B. Liverworts and palm trees
  3. C. Grasses and legumes
  4. D. Juniper and roses
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q13 · Monocots vs dicots

A student made a collection of plants having flowers and seeds from his locality and compared their embryo, leaves and stems using a hand lens. He found that all his collections contain a single seed leaf embryo, long and thin leaves with parallel veins, and stems with scattered vascular bundles. Which option contains plants that can be categorized under his collection?
  1. A. Grasses, orchids, teff and roses
  2. B. Grasses, orchids, teff and beans
  3. C. Grasses, sunflowers, teff and maize
  4. D. Grasses, orchids, teff and maize
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q14 · Food chains / ecology

This item is based on the following diagram of a simple food chain: Leaves → Grasshoppers → Rodents → Leopards. What will happen if the number of rodents significantly decreases?
  1. A. an increase in the number of leopards.
  2. B. fewer grasshoppers in the chain.
  3. C. no change in the number of leopard.
  4. D. an increase in the number of grasshoppers.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q15 · Carbon cycle

Which of the following is NOT a key process involved in the carbon cycle?
  1. A. Evaporation
  2. B. Cellular respiration
  3. C. Photosynthesis
  4. D. Decomposition
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q16 · Mitosis

Which of the following is correct about mitosis? It is a division of
  1. A. somatic cells to make daughter cells with half chromosome.
  2. B. sex cells to make identical daughter cells with doubled chromosome.
  3. C. somatic cells to make identical daughter cells.
  4. D. sex cells to make different daughter cells.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q17 · Mitosis and meiosis

Which one of the following features is common for mitosis and meiosis? They both involve
  1. A. replication of DNA and the formation of daughter cells.
  2. B. production of daughter cells identical to the parent cell.
  3. C. formation of cells with the same chromosome number as parent cell.
  4. D. spermatogenesis and oogenesis processes in males and females.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q18 · Leaf tissues

Which tissues of plant leaves are involved in waterproofing, major photosynthetic, and major gas exchange activities, respectively?
  1. A. Guard cells, palisade mesophyll and epidermis
  2. B. Guard cells, palisade mesophyll and spongy mesophyll
  3. C. Waxy cuticle, palisade mesophyll and spongy mesophyll
  4. D. Waxy cuticle, palisade mesophyll and epidermis
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q19 · Water movement in plants

Which of the following is correct about the movement of water in plants? It moves
  1. A. against a water potential gradient.
  2. B. across the phloem tissue by diffusion.
  3. C. across the tissues of a plant by osmosis.
  4. D. by using energy until it reaches to the xylem.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q20 · Plant hormones / apical dominance

What will happen to the growth of the plant when you remove indole-acetic acid (IAA) from the main shoot part of the plant?
  1. A. The plant will bush out.
  2. B. It stimulates dropping of leaves.
  3. C. The main shoot of the plant elongates.
  4. D. The growth of side shoots will slow down.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q21 · Characteristics of animals

Which of the following is correct about animals? They are
  1. A. Respire, excrete, autotrophic and reproduce
  2. B. Unicellular, excrete, heterotrophic and motility
  3. C. Heterotrophic, excrete, motility and grow
  4. D. Respire, multicellular, autotrophic and reproduce
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q23 · Thermoregulation

What does it mean if an animal is poikilothermic? It
  1. A. changes its body temperature with environmental condition.
  2. B. increases its metabolic rate during cold and hot conditions.
  3. C. keeps its body temperature constant regardless of external changes.
  4. D. produces heat when temperature falls by activating the hypothalamus.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q24 · Enzymes

Which one of the following statements is correct about the catalytic activities of enzymes? They
  1. A. change the overall nature of the products.
  2. B. allow reactions in cells to take place quickly.
  3. C. alter themselves at the end of biochemical reactions.
  4. D. increase the energy required to start a reaction.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q25 · Protein structure

Four students draw four different big protein structure posters. The contents of each of their structure are displayed in the following table. Student I: Polypeptide folded into α-helix and β-sheet, and hydrogen bond; Student II: Amino acid sequences and peptide bonds; Student III: Multiple folded protein subunits in a multi-subunit complex and haem group; Student IV: Side chain interaction of amino acids and overall 3-D shape. Based on the above information, which student drew secondary and quaternary structures, respectively?
  1. A. I and IV
  2. B. II and III
  3. C. I and III
  4. D. II and IV
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q26 · Enzyme specificity

How does the induced-fit model explain enzyme specificity? They
  1. A. change the shape of active site slightly to fit substrates precisely.
  2. B. have a rigid active site that can just bind to single substrate.
  3. C. have multiple active sites that can fit to different substrates.
  4. D. bind to whatever the shape of substrate that fits to allosteric site.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q27 · Enzyme inhibition

What happens to the substrate molecule when competitive inhibitor binds with an enzyme? It
  1. A. undergoes conformational change.
  2. B. cannot bind with the active site.
  3. C. binds to the allosteric site temporarily.
  4. D. easily binds with the active site.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q28 · Allosteric enzymes

What will happen to the reaction if you add a certain inhibitor or activator to the substrate having allosteric enzyme set up?
  1. A. Inhibitor binds to active site to speed up the reaction.
  2. B. Inhibitor binds to regulatory site to increase rate of reaction.
  3. C. Activator binds to active site to initiate the reaction.
  4. D. Activator binds to regulatory site to activate the reaction.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q30 · Enzyme kinetics / optimization

If a given enzyme works only at temperature range of 20 and 45 °C and the potential of hydrogen ions that ranges from 4 to 9. Which one of the following works best during the optimization of these two factors for the enzyme activity?
  1. A. Adjusting the temperature below 20°C makes the enzyme more active, hence the temperature at this value is optimal.
  2. B. Adjusting the pH above 9 can increase the probability of collisions between the enzyme and the substrate.
  3. C. Adjusting the temperature between 20°C and 45°C results little denaturation and increased number of collisions.
  4. D. The optimum pH under which this enzyme is most active is found below 4.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q31 · Chromosomes

All of the following features define a chromosome EXCEPT
  1. A. contains hundreds to thousands of genes.
  2. B. exists in pairs in diploid organisms.
  3. C. made up of DNA and protein.
  4. D. functional unit of inheritance.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q32 · DNA vs RNA

Which structural and functional difference is observed between DNA and RNA?
  1. A. Both DNA and RNA have the same nitrogenous bases but differ in pentose sugar.
  2. B. RNA produces DNA through the process of transcription.
  3. C. RNA stores the genetic material while DNA involves in protein synthesis.
  4. D. DNA is very stable molecule while RNA is degraded quickly.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q33 · Meiosis / telophase I

All of the following events occur during telophase I of meiosis I cell division EXCEPT
  1. A. crossing over takes place.
  2. B. each of the spindle fibers disappears.
  3. C. set of chromosomes come together.
  4. D. nuclear envelope reforms.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q34 · Genetics / monohybrid cross

Suppose there was a cross between pea plants with flower positions axial (AA) and terminal (aa) and produced F1 generation. What will be the most probable number of heterozygous dominant individuals obtained if 1000 offspring were produced by self-crossing of F1 generation?
  1. A. 200
  2. B. 750
  3. C. 500
  4. D. 250
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q35 · Genetics / test cross

If you have a pea plant of unknown genotype with a green pod color, you obtained all green pod colors of offspring phenotype after a test cross. What was the unknown genotype of the parent? It was
  1. A. homozygous dominant.
  2. B. homozygous recessive.
  3. C. heterozygous dominant.
  4. D. incomplete dominant.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q36 · Non-Mendelian inheritance

This item is based on the following examples of genetic inheritance patterns. 1. Inflated and pinched pod forms will have inflated pod form. 2. Red cow and white bull will have roan calf. 3. AA and BB blood type people will have a child with AB blood type. 4. Red and white roses will have a pink rose offspring. From the above patterns of inheritance, which of the following are exemplary for non-Mendelian inheritance?
  1. A. 1, 2, 3
  2. B. 1, 3, 4
  3. C. 1, 2, 4
  4. D. 2, 3, 4
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q37 · Selective breeding

Farmers want to maintain their sheep with long tails for the next generation through similar sheep from their locality in their breeding program. What process do these farmers apply to keep the desired traits in their program?
  1. A. Inbreeding
  2. B. Crossbreeding
  3. C. Genetic engineering
  4. D. Cloning
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q38 · Menstrual cycle / hormones

If progesterone remains high after ovulation, what will be the most likely outcome?
  1. A. FSH will be produced rapidly which leads to a new cycle.
  2. B. Oestrogen will be decreased, closing down the lining of the uterus.
  3. C. Uterus lining will be maintained and prepared for pregnancy.
  4. D. Corpus luteum will be regenerated, inhibiting hormone production.
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q39 · Contraception

The most reliable contraceptive method that prevents travelling of ovum from the ovaries through the fallopian tubes, but requires surgery is
  1. A. contraceptive injection.
  2. B. spermicide.
  3. C. intrauterine device.
  4. D. sterilization.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q40 · STIs / risk factors

Among the following, which one increases the risk to be infected by sexually transmitted infections?
  1. A. Have no history of sexually transmitted infections
  2. B. Misuse of drugs that inhibit your judgment
  3. C. Protective sexual contact and medical treatment
  4. D. Consistent use of condoms during intercourse
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q41 · Contraceptive methods

Two women were decided not to have pregnancy in the near future and they were offered two different contraceptive options. In woman I, the material fitted in her uterus did not allow the sperm to fertilize the egg. In woman II, the contraceptive prevented hormone production and the releasing of eggs from the ovaries. Which type of contraceptive methods did woman I and II used, respectively?
  1. A. Sterilization and Injectable contraceptives Depo-Provera
  2. B. Post pill and copper-coated intrauterine device
  3. C. Contraceptive injection and contraceptive implant
  4. D. Copper-coated intrauterine device and contraceptive injection
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q42 · Harmful traditional practices

The finding of the study conducted in two different villages showed that there are harmful practices that affect reproductive health. The common practices in village 1 were forcing underage girls to get married based on norms and sexual abuse or harassment. In village 2, abduction to make the girl a wife unwillingly was very common. Which one of the following options is correct about the two villages?
  1. A. In village 1, gender-based violence, kidnapping and female genital mutilation are common.
  2. B. In village 1, gender-based violence and early marriage are common.
  3. C. In village 2, kidnapping and female genital mutilation are common.
  4. D. In village 2, gender-based violence and female genital mutilation are common.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q43 · HIV transmission

How does drinking alcohol contribute to HIV transmission? By
  1. A. improving the decision making ability of a person
  2. B. driving more willingly to participate in risky behaviors
  3. C. impotency or loss of sexual drive both in male and female
  4. D. increasing rate of the retrovirus multiplication capacity
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q44 · Natural resources

Select the option where the whole list contains renewable natural resources.
  1. A. Coal, oil, natural gas and minerals
  2. B. Coal, wind, hydro power and biomass
  3. C. Sunlight, wind, hydro power and biomass
  4. D. Sunlight, wind, hydro power and natural gas
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q45 · Wildlife conservation

This item is based on the following list of activities. I. Establishing national parks; II. Wild sanctuaries; III. Preparing wild life reserves; IV. Practicing overgrazing. Which of the above activities CANNOT be used for the conservation of wild life?
  1. A. II
  2. B. I
  3. C. III
  4. D. IV
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q46 · Air pollution / acid rain

Among the following options, identify the air pollutants that can cause acid rain and its effects, respectively.
  1. A. Carbon dioxide and methane - melting of ice caps and rising of oceans
  2. B. Sulphur dioxides and nitrogen dioxides - damaging plants and water
  3. C. Perflourocarbons - causing skin cancer and cataracts
  4. D. Chloroflourocarbons - increasing UV rays and respiratory disease
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q47 · Global warming

Which of the following is the cause and effect of global warming, respectively?
  1. A. Greenhouse gases and dropping of sea levels
  2. B. Greenhouse gases and loss of biodiversity
  3. C. Burning of fossil fuels and increase in species diversity
  4. D. Burning of fossil fuels and dropping of sea level
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q48 · Transgenic organisms

What is the primary purpose of creating transgenic organisms? To
  1. A. generate pathogenic organisms that fight against non-pathogenic ones
  2. B. produce organisms that mimic human beings in every aspect of behaviors
  3. C. promote expression of desired genes that improve nutritional quality of organisms
  4. D. produce novel organisms that can affect reproduction across different species
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q49 · Forensic biology

What is the role of biology in the investigation of a criminal case? To
  1. A. detect flavor compounds in food and monitor environmental pollutants
  2. B. examine potential sources of evidences using blood, saliva and hair
  3. C. sense pathogens and herbicides using immunochemical detection system
  4. D. determine the production of complex organic compounds using mold fungus
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q50 · Biological washing powder

How does biological washing powder save energy? Because they
  1. A. use lipase enzyme without other combination for any stain in clothes.
  2. B. are effective in cleaning clothes at lower temperatures without boiling water.
  3. C. are effective in removing dirty ores in clothes without spraying acidic water.
  4. D. use protease enzyme without other combination for any stain in clothes.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

Practice this subject

Q51 · Biological warfare

What is biological warfare? The use of
  1. A. selective genes to produce genetically modified organisms
  2. B. cloning technique to make exact genetic copies of an organism
  3. C. bacteria, fungi and viruses as a biological agent to control pests
  4. D. infectious agents with the intent to kill humans, animals or plants
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q52 · Bacteria

Which of the following correctly describes the general features of bacteria? They are unicellular microbes with
  1. A. true nucleus and are omnipresent in nature.
  2. B. rigid cell wall and a diverse mode of nutrition.
  3. C. mitochondria and a special type of chlorophyll.
  4. D. Golgi bodies and genetic materials of a cell.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q53 · Archaea

Which group of archaea are found in volcanic vents and hot vapors that contain either obligate aerobes, facultative aerobes or obligate anaerobes?
  1. A. Hyperthermophiles
  2. B. Acidophiles
  3. C. Halophiles
  4. D. Psychrophiles
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q54 · Fungal diseases

From the fungal diseases given below, which one is transmitted sexually?
  1. A. Candidiasis
  2. B. Aspergillosis
  3. C. Tineas
  4. D. Dermatophytosis
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q56 · Viral diseases

Which one of the following diseases is correctly matched with its symptoms and method of transmission?
  1. A. Chickenpox - runny and stuffy nose - respiratory droplets
  2. B. Measles - paralysis and hydrophobia - bite from infected animals
  3. C. Polio - commonly no sign and symptoms - fecal-oral-route
  4. D. Rabies - swollen and painful protid glands - through infected saliva
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q58 · Disease transmission

Sleeping sickness is transmitted by
  1. A. biting of tsetse flies.
  2. B. sexual intercourse.
  3. C. eating contaminated food.
  4. D. droplet infection.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q59 · Importance of microorganisms

Considering the diverse application of microorganisms, which of the following best evaluates their overall importance? They have
  1. A. abundant benefits that are essential for life on Earth.
  2. B. a great disadvantage and limited advantage.
  3. C. limited impact on the environment.
  4. D. few applications in the areas of biotechnology and medicine.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q60 · Microbial control / sterilization

Suppose a clinical nurse used a needle to treat a person with HIV/AIDS. What would be the most appropriate method of controlling such microbial infection?
  1. A. Incineration
  2. B. Tyndallization
  3. C. Sanitization
  4. D. Preservation
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q61 · Microbial isolation

As a clinical microbiologist, suppose you want to collect microbes from a food sample and isolate them via serial dilution. How do you determine the isolated colonies that grow on artificial media?
  1. A. counting the number of strains on the plate
  2. B. cross checking with other preserved specimens
  3. C. observing their morphological features
  4. D. inoculating them into other infected animals
Worked solutionUnofficial

Unofficial keyed letter C. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q62 · Metabolism

What is the main difference between anabolism and catabolism in cellular metabolic pathways? Anabolism
  1. A. absorbs energy while catabolism releases energy.
  2. B. is destructive while catabolism is constructive process.
  3. C. occurs during respiration while catabolism occurs in photosynthesis.
  4. D. breaks down macromolecules while catabolism buildups them.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q63 · Photosynthesis / ecology

In a hypothetical scenario where photosynthesis ceased to occur on the earth, the long-term consequences on the continuity of life would be
  1. A. remained unaffected since other sources of energy exist.
  2. B. collapsed that could lead to mass extinction.
  3. C. balanced between CO2 and O2 appropriately.
  4. D. disordered although animal life would flourish.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q64 · Chloroplast structure

What are the roles of grana and stroma in the process of photosynthesis? Grana is a site for
  1. A. cyclic pathway while stroma is a site for non-cyclic pathway.
  2. B. photolysis of water while stroma is a site for carbon fixation.
  3. C. generation of sugar while stroma is a site for photolysis of water.
  4. D. production of NADPH while stroma is a site for chemiosmosis.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q65 · Photophosphorylation

Which one of the following comparisons between cyclic and non-cyclic photophosphorylation is correct? Non-cyclic photophosphorylation
  1. A. produces ATP, NADPH and O2, but cyclic produces ATP and NADPH.
  2. B. uses oxygen as the final electron acceptor, but cyclic uses cytochrome b-c1 complex.
  3. C. uses photosystem I as electron donor, but cyclic uses water as an electron donor.
  4. D. involves both photosystems I and II, but cyclic uses only photosystem I.
Worked solutionUnofficial

Unofficial keyed letter D. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q66 · Calvin cycle

All of the following events happen in the reduction stages of the Calvin cycle EXCEPT
  1. A. combining of CO2 with RuBP.
  2. B. utilization of ATP and NADPH molecules.
  3. C. conversion of 3-PGA into a sugar molecule.
  4. D. donating of electrons to a 3C-intermediates to form G3P.
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q67 · Photorespiration

What happens in the mitochondrion during the reactions of photorespiration?
  1. A. Glycine is converted to serine with the release of CO2 and NH3.
  2. B. Glycolate is converted to glyoxylate with the release of H2O2.
  3. C. Glycerate is converted to GP with the release of ADP.
  4. D. Phosphoglycolate is converted to glycolate with the release of Pi
Worked solutionUnofficial

Unofficial keyed letter A. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q68 · Photosynthesis / atmosphere

How does photosynthesis ensure the continuity of life? By
  1. A. constantly adding carbon dioxide to the atmosphere
  2. B. maintaining carbon dioxide and oxygen balance in the atmosphere
  3. C. constantly removing oxygen from the atmosphere
  4. D. adding natural gas and absorbing methane from the atmosphere
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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Q69 · Cellular respiration / phosphorylation

Which of the following is the difference between substrate level phosphorylation and oxidative phosphorylation? Substrate level phosphorylation
  1. A. occurs in the inner mitochondrial membrane while oxidative phosphorylation occurs in the cytosol.
  2. B. occurs during glycolysis and Kreb's cycle while oxidative phosphorylation occurs during electron transport chain.
  3. C. has the same source of energy as oxidative phosphorylation.
  4. D. occurs in aerobic respiration while oxidative phosphorylation in anaerobic respiration.
Worked solutionUnofficial

Unofficial keyed letter B. A full worked solution is not published for this item yet.

Unofficial — solved by Abrari, not an official EAES key.

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