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POST UTME ELIZADE UNIVERSITY 2022 Biology | Objective

Are you preparing for POST UTME ELIZADE UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2022 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

In a population of 1000 individuals, 200 are infected with a particular disease. If the disease is caused by a bacterium that has a generation time of 2 hours, what is the expected number of new infections after 12 hours?

A. 400

B. 500

Correct C. 600

D. 800

Correct Answer: C

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Question 2

A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?

A. 1.25 m/s

Correct B. 2.5 m/s

C. 5 m/s

D. 10 m/s

Correct Answer: B

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Question 3

A solution of 0.1 M NaCl is prepared by dissolving 6.0 g of NaCl in 100 mL of water. What is the concentration of the solution in g/L?

A. 0.6 g/L

Correct B. 6.0 g/L

C. 60 g/L

D. 600 g/L

Correct Answer: B

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Question 4

A 10 mL sample of a solution containing 0.5 M HCl is titrated with 0.5 M NaOH. What is the pH of the solution after the titration?

A. 7

B. 8

C. 9

Correct D. 10

Correct Answer: D

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Question 5

A 5 kg block is moving at a speed of 2 m/s on a horizontal surface. If the block is subjected to a force of 10 N, what is the acceleration of the block?

A. 0.5 m/s^2

B. 1 m/s^2

Correct C. 2 m/s^2

D. 5 m/s^2

Correct Answer: C

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Question 6

In the context of evolutionary bio\logy, what is the primary mechanism driving the adaptation of the peppered moth (Biston betularia) to its environment?

Correct A. Natural selection

B. Genetic drift

C. Gene flow

D. Mutation

Correct Answer: A

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Question 7

A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?

A. Cornea

Correct B. Iris

C. Lens

D. Retina

Correct Answer: B

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Question 8

In a population of 1000 individuals, 200 are heterozygous for a particular gene. What is the frequency of the dominant allele in this population?

A. 0.2

Correct B. 0.3

C. 0.4

D. 0.5

Correct Answer: B

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Question 9

A diagram of the water cycle is shown below. Which process is responsible for the formation of clouds?

A. Evaporation

Correct B. Condensation

C. Precipitation

D. Runoff

Correct Answer: B

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Question 10

A diagram of the human circulatory system is shown below. Which part of the system is responsible for the transport of oxygen to the body's tissues?

A. Arteries

B. Veins

Correct C. Capillaries

D. Heart

Correct Answer: C

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Question 11

In a population of 1000 individuals, 80% are heterozygous for the gene controlling the production of a certain enzyme. If 20% of the population are homozygous recessive, what is the frequency of the recessive allele?

Correct A. 0.2

B. 0.3

C. 0.4

D. 0.5

Correct Answer: A

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Question 12

A 2.5 L flask contains 0.5 M HCl. If 1.5 L of 0.5 M NaOH is added to the flask, what is the concentration of the resulting solution?

A. 0.25 M

B. 0.5 M

Correct C. 0.75 M

D. 1.0 M

Correct Answer: C

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Question 13

A plant grows in a pot with a mixture of 70% sand, 20% silt, and 10% clay. If the plant's roots absorb 50% of the water in the pot, what is the percentage of water absorbed by the sand?

Correct A. 35%

B. 40%

C. 45%

D. 50%

Correct Answer: A

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Question 14

A 50 mL sample of a solution containing 0.1 M glu\cose is added to a 100 mL sample of a solution containing 0.2 M fructose. What is the concentration of the resulting solution?

A. 0.05 M

B. 0.1 M

Correct C. 0.15 M

D. 0.2 M

Correct Answer: C

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Question 15

A bacterium has a generation time of 2 hours. If the population size is 1000 at time t = 0, what is the population size at time t = 6 hours?

A. 1000

B. 2000

C. 4000

Correct D. 8000

Correct Answer: D

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Question 16

In the process of cellular respiration, what is the primary function of the electron transport chain?

Correct A. To generate ATP

B. To produce NADH and FADH2

C. To oxidize glu\cose

D. To reduce oxygen

Correct Answer: A

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Question 17

A genetic cross between two pea plants shows a 3:1 ratio of tall to short plants. What is the genotype of the short plants?

A. Tt

Correct B. tt

C. TT

D. T

Correct Answer: B

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Question 18

A nerve impulse travels down a motor neuron at a speed of 120 m/s. If the neuron is 2.5 cm long, how long does it take for the impulse to reach the \end of the neuron?

Correct A. 0.02 s

B. 0.05 s

C. 0.1 s

D. 0.2 s

Correct Answer: A

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Question 19

Asexual reproduction in plants can occur through the production of

A. seeds

Correct B. spores

C. buds

D. rhizomes

Correct Answer: B

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Question 20

The xylem in plants is responsible for transporting

Correct A. water and minerals

B. sugars and amino acids

C. oxygen and carbon dioxide

D. nutrients and hormones

Correct Answer: A

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Question 21

In a population of 1000 individuals, 500 are heterozygous for the gene controlling the production of the enzyme lactase. If 200 individuals are randomly selected for lactase production testing, what is the probability that at least 80 will be lactase producers?

Correct A. 0.95

B. 0.90

C. 0.85

D. 0.80

Correct Answer: A

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Question 22

A researcher studying the effects of antibiotics on bacterial growth notices that the growth rate of a particular strain of bacteria is reduced by 50% after 2 hours of exposure. If the initial population size is 10^6 cells, what is the population size after 4 hours of exposure?

A. 10^5

Correct B. 10^4

C. 10^3

D. 10^2

Correct Answer: B

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Question 23

A plant with a genotype of BBSS is crossed with a plant with a genotype of bbss. What is the probability that the offspring will have a genotype of BBSS?

A. 0.25

Correct B. 0.50

C. 0.75

D. 0.90

Correct Answer: B

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Question 24

A nerve cell has a resting potential of -70 mV. If the cell is stimulated to fire, the membrane potential changes to +30 mV. What is the total change in membrane potential?

A. +100 mV

B. +50 mV

Correct C. +30 mV

D. +20 mV

Correct Answer: C

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Question 25

A person with a diet high in sugar and low in fiber is at risk for developing which of the following diseases?

A. Diabetes

B. Heart disease

C. Cancer

Correct D. All of the above

Correct Answer: D

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