POST UTME COVENANT UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the primary function of the hypothalamus in the regulation of body temperature?
A. Production of heat-shock proteins
B. Regulation of sweat glands
C. Regulation of shivering
D. Regulation of vasodilation
Question 2
In a population of 1000 individuals, the frequency of the dominant allele (A) is 0.6 and the frequency of the recessive allele (a) is 0.4. What is the expected genotype and phenotype frequencies of the offspring when two individuals with genotype Aa are crossed?
A. 0.36 AA, 0.48 Aa, 0.16 aa, 0.36 Tall, 0.48 Medium, 0.16 Short
B. 0.24 AA, 0.56 Aa, 0.20 aa, 0.24 Tall, 0.56 Medium, 0.20 Short
C. 0.48 AA, 0.32 Aa, 0.20 aa, 0.48 Tall, 0.32 Medium, 0.20 Short
D. 0.20 AA, 0.48 Aa, 0.32 aa, 0.20 Tall, 0.48 Medium, 0.32 Short
Question 3
The process of meiosis results in the production of which of the following?
A. Haploid gametes
B. Diploid zygotes
C. Triploid cells
D. Quadruploid cells
Question 4
What is the primary function of the xylem in plants?
A. Transport of sugars and amino acids
B. Transport of water and minerals
C. Transport of gases
D. Transport of hormones
Question 5
In the context of photosynthesis, what is the role of the thylakoid membrane?
A. Site of light-dep\endent reactions
B. Site of light-indep\endent reactions
C. Site of electron transport
D. Site of ATP synthesis
Question 6
A 5.0 L container is filled with a mixture of 2.0 mol of O2 and 3.0 mol of CO2 at 25°C. What is the partial pressure of O2 in the container?
A. 0.25 atm
B. 0.50 atm
C. 0.75 atm
D. 1.00 atm
Question 7
In a population of 1000 Drosophila melanogaster, 200 individuals are homozygous dominant for the gene controlling eye color, 400 are heterozygous, and 400 are homozygous recessive. What is the frequency of the dominant allele?
A. 0.4
B. 0.6
C. 0.8
D. 0.2
Question 8
A diagram of the human brain is shown below. What is the function of the part labeled 'B'?
A. To control voluntary movements
B. To regulate body temperature
C. To process sensory information
D. To produce hormones
Question 9
The nervous system's coordination is primarily achieved through the
A. release of neurotransmitters
B. action potentials in neurons
C. synaptic plasticity
D. neurotransmitter reuptake
Question 10
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 its angular frequency?
A. 10 rad/s
B. 20 rad/s
C. 5 rad/s
D. 15 rad/s
Question 11
A diagram of a human eye is shown below. What is the function of the structure labeled 'Y'?
A. focu\sing light
B. detecting light
C. regulating light
D. absorbing light
Question 12
In a eukaryotic cell, what is the primary function of the Golgi apparatus?
A. Protein synthesis
B. Cell signaling
C. Lipid modification and sorting
D. Cholesterol synthesis
Question 13
A 2.5 cm long fish is placed in a \tank with a 5 cm long fish. If the \tank is 10 cm long, what is the ratio of the dis\tance the 2.5 cm long fish can swim to the dis\tance the 5 cm long fish can swim?
A. 1:2
B. 1:3
C. 2:3
D. 3:4
Question 14
The process of mitosis in eukaryotic cells involves the division of the nucleus into two daughter nuclei, each containing the same number of
A. chromosomes
B. genes
C. ribosomes
D. mitochondria
Question 15
A 2m long pipe has a diameter of 5cm. What is the cross-sectional area of the pipe?
A. 0.25cm^2
B. 0.50cm^2
C. 0.75cm^2
D. 1.00cm^2

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