POST UTME CRAWFORD UNIVERSITY 2021 Biology | Objective

Are you preparing for POST UTME CRAWFORD UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
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. 0.6
B. 0.4
C. 0.2
D. 0.8

Correct Answer: A

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Question 2
A cell in the G2 phase of the cell cycle has a DNA content of 8C. What is the stage of the cell cycle that this cell will enter next?
A. G1
B. S
C. G2
Correct D. M

Correct Answer: D

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Question 3
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a random sample of 50 individuals is taken from this population, what is the probability that the sample mean height will be greater than 175 cm?
A. 0.1
B. 0.2
C. 0.3
Correct D. 0.4

Correct Answer: D

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Question 4
A certain species of plant has a photosynthetic rate of 10 mg CO2/h. If the plant is exposed to a light intensity of 1000 μmol/m2/s, what is the rate of photosynthesis?
Correct A. 0.01
B. 0.1
C. 1
D. 10

Correct Answer: A

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Question 5
A certain species of animal has a population growth rate of 20% per year. If the initial population is 1000 individuals, what will be the population size after 5 years?
A. 1000
B. 1200
C. 1500
Correct D. 2000

Correct Answer: D

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Question 6
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
Correct A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles

Correct Answer: A

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Question 7
In a tropical rainforest, the primary producers are plants that undergo photosynthesis. Which of the following is a characteristic of photosynthesis?
A. It requires sunlight to occur
Correct B. It produces glu\cose and oxygen
C. It occurs in the mitochondria
D. It requires water to occur

Correct Answer: B

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Question 8
In a human cell, the process of apoptosis is initiated by the activation of caspases. Which of the following is a characteristic of caspases?
Correct A. They are a type of protease
B. They are involved in cell division
C. They are involved in cell signaling
D. They are involved in DNA replication

Correct Answer: A

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Question 9
In a e\cosystem, the primary consumers are organisms that feed on producers. Which of the following is an example of a primary consumer?
Correct A. Grasshopper
B. Frog
C. Snake
D. Bear

Correct Answer: A

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Question 10
In a human cell, the process of meiosis is initiated by the breakdown of the nuclear envelope. Which of the following structures is responsible for this breakdown?
Correct A. Nuclear lamina
B. Nuclear envelope
C. Mitotic spindle
D. Centrioles

Correct Answer: A

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Question 11
The process of natural selection leads to the evolution of a population in which the frequency of a particular trait increases over time. Which of the following is a consequence of this process?
A. The population becomes more genetically diverse.
Correct B. The population becomes more adapted to its environment.
C. The population becomes more genetically uniform.
D. The population becomes more susceptible to disease.

Correct Answer: B

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Question 12
A diagram of the human nervous system is shown below. Which of the following is a function of the cerebellum?
A. Regulation of body temperature.
Correct B. Coordination of muscle movements.
C. Control of heart rate.
D. Regulation of blood pressure.

Correct Answer: B

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Question 13
A bio\logist is studying the classification of living organisms. Which of the following is a characteristic of the domain Archaea?
A. Cell wall composed of peptidoglycan.
B. Cell membrane composed of sterols.
Correct C. Cell wall composed of pseudopeptidoglycan.
D. Cell membrane composed of phospholipids.

Correct Answer: C

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Question 14
A diagram of a food web is shown below. Which of the following is a characteristic of a producer in this e\cosystem?
A. Consumes other organisms for energy.
Correct B. Produces its own food through photosynthesis.
C. Decomposes dead organisms for nutrients.
D. Stores energy in the form of fat.

Correct Answer: B

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Question 15
A bio\logist is studying the structure of the human body. Which of the following is a characteristic of the epithelial tissue?
A. Composed of muscle cells.
B. Composed of nerve cells.
Correct C. Composed of epithelial cells.
D. Composed of connective tissue cells.

Correct Answer: C

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Question 16
In a eukaryotic cell, the process of mitosis involves the separation of chromosomes into two daughter cells. Which stage of mitosis is characterized by the condensation of chromosomes and the formation of the spindle apparatus?
Correct A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: A

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Question 17
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is a byproduct of the light-dep\endent reactions?
A. ATP
Correct B. NADPH
C. O2
D. H2O

Correct Answer: B

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Question 18
In the human digestive system, the small intestine is responsible for the absorption of nutrients from food. Which of the following is a type of enzyme that plays a crucial role in the digestion of carbohydrates?
Correct A. Amylase
B. Lactase
C. Tryp\sin
D. Pep\sin

Correct Answer: A

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Question 19
The process of asexual reproduction in plants involves the production of offspring without the involvement of gametes. Which of the following is an example of a type of asexual reproduction in plants?
A. Budding
B. Fragmentation
Correct C. Runners
D. Rhizome

Correct Answer: C

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Question 20
The human eye has a complex structure that allows it to detect light and transmit visual information to the brain. Which of the following is a type of cell found in the retina that is responsible for detecting light?
Correct A. Rod cells
B. Cones
C. Bipolar cells
D. Ganglion cells

Correct Answer: A

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Question 21
The process of cellular respiration involves the breakdown of glu\cose to produce ATP. Which of the following is a key intermediate in this process?
Correct A. Pyruvate
B. Citrate
C. Oxaloacetate
D. Alpha-ketoglutarate

Correct Answer: A

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Question 22
A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?
A. A
B. B
Correct C. C
D. D

Correct Answer: C

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Question 23
The Hardy-Weinberg principle states that the frequency of alleles in a population remains cons\tant from generation to generation. Which of the following is a condition necessary for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
Correct D. All of the above

Correct Answer: D

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Question 24
A diagram of the human heart is shown below. Which part of the heart pumps blood to the lungs?
A. A
B. B
Correct C. C
D. D

Correct Answer: C

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Question 25
The process of mitosis involves the division of a cell into two daughter cells. Which of the following is a stage of mitosis?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

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