POST UTME MOUNTAIN TOP UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of 1000 individuals, 200 are infected with a disease. If the disease is caused by a bacterium that can be transmitted through direct contact, and the rate of transmission is 0.05 per day, what is the expected number of new infections after 10 days?
A. 100
B. 200
C. 300
D. 400
Question 2
The process of mitosis results in the production of what type of cells?
A. Somatic cells
B. Germ cells
C. Muscle cells
D. Nerve cells
Question 3
A diagram of the human excretory system is shown below. What is the primary function of the kidneys?
A. To filter waste products from the blood
B. To regulate body temperature
C. To produce hormones that stimulate growth
D. To produce urine
Question 4
In the cell cycle, what is the stage where the cell prepares for division?
A. G1 phase
B. S phase
C. G2 phase
D. Mitosis
Question 5
A 2.5 L flask contains 0.5 M NaOH. If 25 mL of 1.5 M HCl is slowly added to the flask, what is the concentration of the resulting solution?
A. 0.75 M
B. 0.5 M
C. 0.25 M
D. 0.125 M
Question 6
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
B. To produce NADH and FADH2 from the citric acid cycle
C. To pump protons across the mitochondrial inner membrane, creating a proton gradient
D. To reduce oxygen to water
Question 7
A researcher is studying the effects of pH on enzyme activity. Which of the following enzymes is most likely to be affected by a change in pH?
A. Amylase
B. Lactase
C. Pep\sin
D. Tryp\sin
Question 8
A researcher is studying the population dynamics of a species in a savanna e\cosystem. Which of the following is a type of population growth curve?
A. Logistic growth curve
B. Exponential growth curve
C. Sigmoid growth curve
D. Linear growth curve
Question 9
In a tropical rainforest, the leaf structure of a tree species is adapted to maximize photosynthesis. Which of the following is a characteristic of the leaf structure?
A. Large surface area for gas exchange
B. Thick cuticle to prevent water loss
C. Small stomata to reduce transpiration
D. Waxy coating to reflect sunlight
Question 10
A researcher is studying the effect of a new antibiotic on a bacterial population. The researcher finds that the population grows exponentially at first, but then slows down and eventually reaches a plateau. What is the most likely explanation for this phenomenon?
A. The bacteria are adapting to the antibiotic
B. The antibiotic is not effective against the bacteria
C. The bacteria are dying off due to the antibiotic
D. The bacteria are growing in a new environment
Question 11
The process of cellular respiration can be divided into three main stages: glycolysis, the citric acid cycle, and what?
A. Fermentation
B. Mitochondrial electron transport
C. Lipid metabolism
D. Protein synthesis
Question 12
In a photosynthetic pathway, which enzyme catalyzes the conversion of ribulose-1,5-bisphosphate to 3-phosphoglycerate?
A. Ribulose-1,5-bisphosphate carboxylase/oxygenase
B. Phosphoglycerate kinase
C. Triosephosphate isomerase
D. Enolase
Question 13
A plant is placed in a controlled environment with a cons\tant temperature and humidity. The plant's growth is measured over time. What type of experiment is this?
A. Field experiment
B. Greenhouse experiment
C. Laboratory experiment
D. Controlled experiment
Question 14
In asexual reproduction, which of the following organisms can reproduce without the involvement of gametes?
A. Bacteria
B. Fungi
C. Plants
D. Animals
Question 15
A patient is experiencing symptoms of a vitamin deficiency. Which of the following is a sign of vitamin B12 deficiency?
A. Fatigue and weakness
B. Numbness and tingling in hands and feet
C. Diarrhea and abdominal pain
D. Rapid heartbeat and palpitations

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