POST UTME IGBINEDION UNIVERSITY 2021 Biology | Objective

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Question 1 View Details
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 dominant allele 'A'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

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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 a cell undergoing mitosis, the chromosomes are duplicated and attached to the spindle fibers. What is the stage of mitosis at which the chromosomes are most condensed?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

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Question 4 View Details
A diagram of the human brain is shown below. Which part of the brain is responsible for controlling voluntary movements?
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord

Correct Answer: A

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Question 5 View Details
A diagram of the cell cycle is shown below. Which stage of the cell cycle is characterized by the synthesis of new DNA?
A. G1
Correct B. S
C. G2
D. M

Correct Answer: B

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Question 6 View Details
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. 0.64
B. 0.36
C. 0.16
D. 0.44

Correct Answer: A

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Question 7 View Details
A cell undergoing mitosis has a DNA content of 2C. If the cell is in the prophase stage, what is the next stage it will enter?
A. Metaphase
Correct B. Anaphase
C. Telophase
D. Cytokinesis

Correct Answer: B

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Question 8 View Details
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 4, what is the new photosynthetic rate?
A. 20 μmol CO2 s-1
Correct B. 40 μmol CO2 s-1
C. 80 μmol CO2 s-1
D. 100 μmol CO2 s-1

Correct Answer: B

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Question 9 View Details
A 2.0 g sample of a subs\tance is digested with 10 mL of 2 M HCl. If the resulting solution has a pH of 1.5, what is the concentration of the subs\tance?
A. 0.1 M
B. 0.2 M
Correct C. 0.5 M
D. 1.0 M

Correct Answer: C

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Question 10 View Details
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Cell wall
Correct B. Plasma membrane
C. Vacuole
D. Chloroplast

Correct Answer: B

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Question 11 View Details
In a population of 1000 individuals, the frequency of the dominant allele is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?
Correct A. 0.4
B. 0.2
C. 0.8
D. 0.1

Correct Answer: A

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Question 12 View Details
A researcher isolates a microorganism that exhibits both aerobic and anaerobic respiration. What is the most likely type of microorganism?
A. Bacteria
Correct B. Yeast
C. Mold
D. Fungus

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 'X'?
Correct A. Photosynthesis
B. Respiration
C. Cell division
D. Cell signaling

Correct Answer: A

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Question 14 View Details
A species of bird has a wing span of 2.5 meters. If the bird flies at a speed of 50 km/h, what is its average velocity?
Correct A. 25 m/s
B. 50 m/s
C. 75 m/s
D. 100 m/s

Correct Answer: A

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Question 15 View Details
A diagram of a circuit is shown below. What is the value of the current flowing through the circuit?
A. 2 A
Correct B. 4 A
C. 6 A
D. 8 A

Correct Answer: B

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Question 16 View Details
In a tropical rainforest e\cosystem, what is the primary role of the leaf's cuticle in relation to water loss?
A. To prevent water loss through transpiration
B. To facilitate water uptake from the soil
Correct C. To regulate stomatal opening and clo\sing
D. To absorb light for photosynthesis

Correct Answer: C

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Question 17 View Details
A cell is placed in a hypotonic solution. What will happen to the cell's volume?
A. The cell will shrink
Correct B. The cell will swell
C. The cell will remain unchanged
D. The cell will burst

Correct Answer: B

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Question 18 View Details
What is the function of the Golgi apparatus in a cell?
A. To synthesize proteins
Correct B. To modify and package proteins
C. To transport materials within the cell
D. To degrade cellular waste

Correct Answer: B

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Question 19 View Details
A plant is placed in a solution with a high concentration of salt. What will happen to the plant's roots?
A. The roots will grow longer
Correct B. The roots will grow shorter
C. The roots will remain unchanged
D. The roots will die

Correct Answer: B

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Question 20 View Details
What is the process by which plants release water vapor into the air?
A. Respiration
B. Photosynthesis
Correct C. Transpiration
D. Evaporation

Correct Answer: C

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Question 21 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. 0.4
C. 0.8
D. 0.2

Correct Answer: A

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Question 22 View Details
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by a factor of 4, what is the new photosynthetic rate?
Correct A. 40 μmol CO2 s-1
B. 20 μmol CO2 s-1
C. 10 μmol CO2 s-1
D. 5 μmol CO2 s-1

Correct Answer: A

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Question 23 View Details
A microorganism has a generation time of 2 hours. If the population size is 1000 cells at time t = 0, what is the population size at time t = 4 hours?
Correct A. 16000
B. 8000
C. 4000
D. 2000

Correct Answer: A

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Question 24 View Details
A diagram of a cell is shown below. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Mitochondria
Correct C. Ribosomes
D. Lysosomes

Correct Answer: C

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Question 25 View Details
A diagram of a cell cycle is shown below. Which of the following stages is characterized by DNA replication?
A. G1
Correct B. S
C. G2
D. M

Correct Answer: B

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