POST UTME AL-HIKMAH UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of natural selection can lead to the evolution of a population in which the frequency of a particular trait increases over time. Which of the following is a possible explanation for this phenomenon?
A. Genetic drift
B. Mutation
C. Gene flow
D. Artificial selection
Question 2
The process of osmoregulation in bacteria involves the movement of water across the cell membrane through a specific type of transport protein. What is the name of this protein?
A. Aquaporin
B. Porin
C. Channel protein
D. Carrier protein
Question 3
The process of mitosis in eukaryotic cells involves the division of the nucleus into two daughter nuclei. Which of the following statements about the prophase stage of mitosis is correct?
A. The chromosomes condense and become visible.
B. The nuclear envelope breaks down.
C. The centrioles move apart.
D. The cytoplasm divides.
Question 4
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of a particular enzyme. If 20% of the population are homozygous recessive, what is the frequency of the dominant allele?
A. 0.4
B. 0.5
C. 0.6
D. 0.7
Question 5
The growth of a plant is influenced by a variety of factors, including light, temperature, and water. What is the primary effect of light on plant growth?
A. To increase the rate of photosynthesis
B. To decrease the rate of respiration
C. To increase the rate of transpiration
D. To decrease the rate of growth
Question 6
A diagram of the human reproductive system is shown below. What is the function of the ovary?
A. production of sperm
B. production of eggs
C. transport of sperm
D. transport of eggs
Question 7
A patient is diagnosed with a viral infection caused by the influenza virus. The patient is prescribed a course of antiviral medication, which includes a combination of oseltamivir and zanamivir. What is the mechanism of action of oseltamivir against the influenza virus?
A. Oseltamivir inhibits viral replication by binding to the viral neuraminidase.
B. Oseltamivir inhibits viral entry by binding to the viral hemagglutinin.
C. Oseltamivir inhibits viral transcription by binding to the viral RNA polymerase.
D. Oseltamivir inhibits viral translation by binding to the viral ribonucleoprotein.
Question 8
In a tropical rainforest e\cosystem, the primary producers are the plants and algae, which undergo photosynthesis to produce glu\cose and oxygen. However, in a coral reef e\cosystem, the primary producers are the algae and cyanobacteria that live inside the coral polyps. What is the primary difference between the two e\cosystems in terms of their primary producers?
A. The primary producers in a tropical rainforest e\cosystem are plants and algae, while in a coral reef e\cosystem, they are algae and cyanobacteria.
B. The primary producers in a tropical rainforest e\cosystem are algae and cyanobacteria, while in a coral reef e\cosystem, they are plants and algae.
C. The primary producers in both e\cosystems are the same, which are plants and algae.
D. The primary producers in both e\cosystems are the same, which are algae and cyanobacteria.
Question 9
A researcher is studying the population dynamics of a species of deer in a forest e\cosystem. The deer population is modeled by the \logistic growth equation: dP/dt = rP\( 1 - P/K \), where P is the population size, r is the intrinsic growth rate, and K is the carrying capacity. If the deer population is currently at 100 individuals and the carrying capacity is 500 individuals, what is the rate of change of the population size with respect to time?
A. r\( 1 - 100/500 \)
B. r\( 100/500 \)
C. r\( 1 - 500/100 \)
D. r\( 500/100 \)
Question 10
In the context of evolutionary theories, what is the primary mechanism by which genetic drift occurs?
A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection
Question 11
The process of digestion in the human body involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following statements about the small intestine is correct?
A. The small intestine is responsible for absorbing glu\cose and amino acids.
B. The small intestine is responsible for absorbing water and electrolytes.
C. The small intestine is responsible for absorbing fats and oils.
D. The small intestine is responsible for absorbing vitamins and minerals.
Question 12
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 13
The process of photosynthesis in plants involves the conversion of light energy into chemical energy, resulting in the production of glu\cose and oxygen. Which of the following statements about the light-dep\endent reactions is correct?
A. The light-dep\endent reactions occur in the mitochondria.
B. The light-dep\endent reactions produce ATP and NADPH.
C. The light-dep\endent reactions occur in the chloroplast.
D. The light-dep\endent reactions produce glu\cose and oxygen.
Question 14
The classification of living things is based on the concept of homo\logy, which refers to the presence of similar structures in different organisms. What is an example of homo\logy in the animal kingdom?
A. The presence of wings in birds and insects
B. The presence of limbs in vertebrates
C. The presence of gills in fish and amphibians
D. The presence of eyes in vertebrates
Question 15
A diagram of the human brain is shown below. Which of the following structures is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: