POST UTME AL-HIKMAH UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a eukaryotic cell, the process of mitosis involves the division of the nucleus into two daughter nuclei, each containing the same number and type of chromosomes as the parent nucleus. Which of the following stages of mitosis is characterized by the condensation of chromosomes and the formation of the metaphase plate?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 2
A researcher is studying the effects of temperature on the growth rate of a microorganism. The researcher measures the growth rate at different temperatures and plots the data on a graph. What is the likely shape of the graph?
A. A straight line with a positive slope.
B. A curve with a maximum point.
C. A curve with a minimum point.
D. A straight line with a negative slope.
Question 3
The process by which the body maintains a stable internal environment despite changes in the external environment is known as
A. Homeostasis
B. Regulation
C. Control
D. Equilibrium
Question 4
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 5
A 10.0 mL sample of a solution containing 0.5 M NaCl is added to 50.0 mL of water. What is the concentration of the resulting solution?
A. 0.1 M
B. 0.2 M
C. 0.3 M
D. 0.4 M
Question 6
In the context of excretion and osmoregulation, what is the primary function of the kidneys?
A. To regulate the amount of water in the body
B. To regulate the amount of electrolytes in the body
C. To regulate the amount of waste products in the body
D. To regulate the amount of blood pressure in the body
Question 7
A cell is placed in a hypertonic solution. What will happen to the cell?
A. The cell will swell and eventually burst
B. The cell will shrink and eventually die
C. The cell will remain unchanged
D. The cell will grow and divide
Question 8
The diagram below represents a cross-section of a plant root. Identify the part labeled 'A':
A. Epidermis
B. Cortex
C. Endodermis
D. Steles
Question 9
A population of rabbits is growing exponentially. If the initial population is 100 and the growth rate is 20% per year, what will be the population after 5 years?
A. 1000
B. 2000
C. 4000
D. 8000
Question 10
In the human circulatory system, the heart pumps blood through a network of blood vessels, including arteries, veins, and capillaries. Which of the following is a function of the capillaries?
A. To carry oxygenated blood from the lungs to the heart
B. To carry deoxygenated blood from the heart to the lungs
C. To exchange oxygen and carbon dioxide between the blood and tissues
D. To regulate blood pressure
Question 11
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'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 12
A diagram of a plant cell is shown below. What is the function of the cell wall?
A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To produce energy for the cell
D. To synthesize proteins for the cell
Question 13
A 5.0 L sample of a gas is collected over water at 25°C and 1 atm. If the partial pressure of the gas is 0.8 atm, what is the mole \fraction of the gas?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 14
A patient is diagnosed with a genetic disorder that affects the production of a specific enzyme. The patient's enzyme activity is measured and found to be 20% of the normal value. What is the likely effect of this enzyme deficiency on the patient's metabolism?
A. The patient's metabolism will be slowed down, leading to decreased energy production.
B. The patient's metabolism will be accelerated, leading to increased energy production.
C. The patient's metabolism will be unaffected.
D. The patient's metabolism will be affected, but the effect will be unpredictable.
Question 15
The diagram below shows the structure of a neuron. What is the function of the d\endrites?
A. Receive signals from other neurons
B. Transmit signals to other neurons
C. Produce ATP for the neuron
D. Store genetic information

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