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POST UTME IMS U 2024 Biology | Objective

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Question 1 View Details

In the context of evolutionary theory, what is the primary mechanism by which genetic drift influences the frequency of a particular allele in a population?

A. Natural selection

Correct B. Genetic drift

C. Gene flow

D. Mutation

Correct Answer: B

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Question 2 View Details

A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?

A. Cornea

B. Iris

Correct C. Retina

D. Lens

Correct Answer: C

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Question 3 View Details

In the context of reproductive bio\logy, what is the primary function of the zona pellucida in the process of fertilization?

A. To provide nutrients to the embryo

B. To facilitate sperm-egg interaction

C. To regulate the timing of ovulation

Correct D. To prevent polyspermy

Correct Answer: D

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Question 4 View Details

A diagram of the human respiratory system is shown below. Which part of the system is responsible for exchanging oxygen and carbon dioxide?

A. Trachea

B. Bronchi

Correct C. Alveoli

D. Diaphragm

Correct Answer: C

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Question 5 View Details

In the context of evolutionary theory, what is the primary mechanism by which natural selection acts on a population?

A. Genetic drift

B. Gene flow

C. Mutation

Correct D. Natural selection

Correct Answer: D

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Question 6 View Details

A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?

Correct A. 0.6

B. 0.8

C. 0.4

D. 0.9

Correct Answer: A

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Question 7 View Details

A researcher is studying the effect of temperature on the rate of photosynthesis in a plant. The data collected is as follows: Temperature (°C) 20 25 30 35 Rate of photosynthesis \( mg CO2/h \) 10 15 20 25

Correct A. \text{y = 0.5x + 5}

B. \text{y = 0.8x + 10}

C. \text{y = x - 5}

D. \text{y = 2x - 10}

Correct Answer: A

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Question 8 View Details

A cell is placed in a solution with a concentration of 0.1 M glu\cose. The cell membrane is permeable to glu\cose. What is the concentration of glu\cose inside the cell after 10 minutes?

A. 0.01 M

Correct B. 0.05 M

C. 0.1 M

D. 0.5 M

Correct Answer: B

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Question 9 View Details

A population of bacteria is growing exponentially. The initial population is 100 bacteria, and the population doubles every 2 hours. What is the population after 6 hours?

A. 1600

B. 2000

Correct C. 4000

D. 8000

Correct Answer: C

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Question 10 View Details

A plant is placed in a greenhouse with a temperature of 25°C and a relative humidity of 60%. The plant requires a temperature of 20°C and a relative humidity of 80% to grow optimally. What is the rate of transpiration of the plant?

A. 0.1 g/h

B. 0.5 g/h

Correct C. 1.0 g/h

D. 2.0 g/h

Correct Answer: C

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Question 11 View Details

In a steady-state condition, the rate of glu\cose uptake by a cell is equal to the rate of glu\cose release from the cell. What is the likely reason for this equilibrium?

A. The cell is in a state of dormancy.

B. The cell is undergoing rapid cell division.

C. The cell is in a state of nutrient scarcity.

Correct D. The cell is in a state of energy surplus.

Correct Answer: D

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Question 12 View Details

A plant root system consists of a taproot and a system of smaller lateral roots. What is the primary function of the taproot?

A. To anchor the plant in the soil.

Correct B. To absorb water and nutrients from the soil.

C. To store food and nutrients.

D. To produce hormones that regulate plant growth.

Correct Answer: B

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Question 13 View Details

A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?

A. To regulate the movement of materials in and out of the cell.

B. To synthesize proteins.

Correct C. To store genetic information.

D. To produce energy for the cell.

Correct Answer: C

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Question 14 View Details

A diagram of a human circulatory system is shown below. What is the function of the structure labeled 'B'?

Correct A. To pump blood throughout the body.

B. To filter waste products from the blood.

C. To regulate body temperature.

D. To produce hormones that regulate body functions.

Correct Answer: A

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Question 15 View Details

A diagram of a plant root system is shown below. What is the primary function of the structure labeled 'C'?

A. To anchor the plant in the soil.

Correct B. To absorb water and nutrients from the soil.

C. To store food and nutrients.

D. To produce hormones that regulate plant growth.

Correct Answer: B

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Question 16 View Details

In the context of cell division, what is the primary function of the centrioles during the prophase stage of mitosis?

Correct A. To form the spindle fibers

B. To replicate the DNA

C. To condense the chromatin

D. To form the nuclear envelope

Correct Answer: A

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Question 17 View Details

A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a characteristic 'safety pin' appearance under the microscope. What is the most likely genus of the bacteria?

Correct A. Staphylococcus

B. Streptococcus

C. Bacillus

D. Clostridium

Correct Answer: A

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Question 18 View Details

A diagram of the human brain is shown below. Which part of the brain is responsible for proces\sing visual information?

Correct A. Cerebrum

B. Cerebellum

C. Brainstem

D. Spinal cord

Correct Answer: A

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Question 19 View Details

A patient is diagnosed with a viral infection. The virus has a characteristic 'herringbone' appearance under the electron microscope. What is the most likely family of the virus?

Correct A. Poxviridae

B. Herpesviridae

C. Adenoviridae

D. Retroviridae

Correct Answer: A

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Question 20 View Details

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 21 View Details

In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. The frequency of the dominant allele 'A' is therefore 0.8. U\sing the Hardy-Weinberg principle, calculate the frequency of the genotype 'AA' in the population.

Correct A. 0.64

B. 0.36

C. 0.16

D. 0.04

Correct Answer: A

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Question 22 View Details

A 2.5-liter flask contains 1.5 liters of a solution with a pH of 3.5. What is the concentration of hydrogen ions in the solution?

A. 0.01 M

Correct B. 0.1 M

C. 1 M

D. 10 M

Correct Answer: B

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Question 23 View Details

A researcher is studying the effect of temperature on the growth of E. coli. The researcher measures the growth rate of the bacteria at different temperatures and plots the data on a graph. Which of the following types of graphs would be most appropriate for this data?

A. Line graph

B. Bar graph

Correct C. Scatter plot

D. Histogram

Correct Answer: C

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Question 24 View Details

A 50-kg person is s\tanding on a scale in an elevator. The elevator is accelerating upward at 2 m/s^2. What is the reading on the scale?

A. 50 N

B. 60 N

Correct C. 70 N

D. 80 N

Correct Answer: C

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Question 25 View Details

A plant has a photosynthetic rate of 10 μmol CO2/s. If the concentration of CO2 in the air is 400 ppm, what is the rate of photosynthesis?

A. 4 μmol CO2/s

Correct B. 10 μmol CO2/s

C. 20 μmol CO2/s

D. 40 μmol CO2/s

Correct Answer: B

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