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POST UTME IMS U 2018 Biology | Objective

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Question 1

In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of a certain enzyme. If 20% of the population is homozygous recessive, what is the frequency of the dominant allele?

Correct A. 0.4

B. 0.5

C. 0.6

D. 0.7

Correct Answer: A

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Question 2

A researcher isolates a microorganism that exhibits both aerobic and anaerobic respiration. Which of the following best describes the metabolic process of this microorganism?

A. Aerobic respiration only

B. Anaerobic respiration only

Correct C. Both aerobic and anaerobic respiration

D. Neither aerobic nor anaerobic respiration

Correct Answer: C

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Question 3

A diagram of a plant cell is shown below. Which of the following organelles is responsible for protein synthesis?

A. Nucleus

Correct B. Ribosome

C. Mitochondria

D. Endoplasmic reticulum

Correct Answer: B

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Question 4

A population of 1000 individuals is divided into two groups: one group has 50% of the individuals with the dominant allele, and the other group has 50% of the individuals with the recessive allele. If the two groups are allowed to interbreed, what is the expected frequency of the dominant allele in the offspring?

A. 0.25

Correct B. 0.5

C. 0.75

D. 0.9

Correct Answer: B

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Question 5

A researcher isolates a microorganism that exhibits both aerobic and anaerobic respiration. Which of the following best describes the metabolic process of this microorganism?

A. Aerobic respiration only

B. Anaerobic respiration only

Correct C. Both aerobic and anaerobic respiration

D. Neither aerobic nor anaerobic respiration

Correct Answer: C

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Question 6

In a human being, the transport of oxygen from the lungs to the tissues is primarily facilitated by the

Correct A. blood

B. lymphatic system

C. nervous system

D. \endocrine system

Correct Answer: A

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Question 7

The process by which plants transport water and minerals from the roots to the leaves is known as

A. transpiration

B. photosynthesis

C. respiration

Correct D. translocation

Correct Answer: D

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Question 8

The cell cycle consists of four stages: interphase, prophase, metaphase, anaphase, and

Correct A. telophase

B. cytokinesis

C. synthesis

D. replication

Correct Answer: A

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Question 9

The process by which the body gets rid of waste products and excess subs\tances is known as

Correct A. excretion

B. osmoregulation

C. homeostasis

D. metabolism

Correct Answer: A

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Question 10

The genetic material that is passed from one generation to the next is known as

Correct A. DNA

B. RNA

C. proteins

D. carbohydrates

Correct Answer: A

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Question 11

In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?

Correct A. 0.36

B. 0.64

C. 0.72

D. 0.84

Correct Answer: A

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Question 12

A cell in the G2 phase of the cell cycle has a DNA content of 8C. If the cell undergoes mitosis, what will be the DNA content of the daughter cells?

A. 4C

B. 8C

Correct C. 16C

D. 32C

Correct Answer: C

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Question 13

The diagram below shows the structure of a nerve cell. Which part of the cell is responsible for transmitting signals to other cells?

A. D\endrite

Correct B. Axon

C. Cell body

D. Myelin sheath

Correct Answer: B

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Question 14

A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.05 per hour, what will be the population size after 5 hours?

A. 1000

B. 5000

C. 10000

Correct D. 20000

Correct Answer: D

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Question 15

The diagram below shows the structure of a plant cell. Which part of the cell is responsible for photosynthesis?

Correct A. Chloroplast

B. Vacuole

C. Cell wall

D. Cytoplasm

Correct Answer: A

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Question 16

In the context of plant growth and development, what is the primary function of auxins?

Correct A. Promoting cell elongation

B. Regulating cell division

C. Inhibiting cell growth

D. Controlling stomatal opening

Correct Answer: A

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Question 17

A diagram of the human eye is shown below. Identify the part labeled 'A'.

Correct A. Cornea

B. Iris

C. Retina

D. Optic nerve

Correct Answer: A

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Question 18

The diagram below shows the structure of a xylem vessel. What is the primary function of the lignin in this vessel?

Correct A. Providing structural support

B. Regulating water transport

C. Inhibiting bacterial growth

D. Enhancing nutrient uptake

Correct Answer: A

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Question 19

A diagram of the human reproductive system is shown below. Identify the part labeled 'B'.

A. Testis

Correct B. Ovary

C. Uterus

D. Vagina

Correct Answer: B

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Question 20

The diagram below shows the structure of a blood vessel. What is the primary function of the \endothelium in this vessel?

A. Regulating blood pressure

Correct B. Inhibiting blood clotting

C. Enhancing nutrient uptake

D. Providing structural support

Correct Answer: B

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Question 21

In a population of 1000 individuals, 70% have the dominant allele for the ABO blood group system. If 20% of the population is type O, what is the frequency of the recessive allele?

Correct A. 0.15

B. 0.20

C. 0.25

D. 0.30

Correct Answer: A

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Question 22

A plant with the genotype Rr is crossed with a plant with the genotype rr. What is the probability that the offspring will have the genotype RR?

A. 0.25

Correct B. 0.50

C. 0.75

D. 0.90

Correct Answer: B

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Question 23

A solution of glu\cose is placed in a beaker and allowed to diffuse through a semipermeable membrane into a solution of sucrose. What is the direction of the net movement of water molecules?

A. From the sucrose solution to the glu\cose solution

Correct B. From the glu\cose solution to the sucrose solution

C. There is no net movement of water molecules

D. The direction of the net movement of water molecules dep\ends on the concentration of the solutions

Correct Answer: B

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Question 24

A nerve impulse travels down a neuron through the process of

A. Diffusion

B. Osmosis

C. Active transport

Correct D. Action potential

Correct Answer: D

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Question 25

The process by which plants convert light energy into chemical energy is called

A. Respiration

Correct B. Photosynthesis

C. Transpiration

D. Evaporation

Correct Answer: B

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