POST UTME SKYLINE UNIVERSITY 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A patient presents with symptoms of malabsorption, including diarrhea and weight loss. Laboratory tests reveal a deficiency in the enzyme lactase. What is the most likely cause of this patient's symptoms?
A. Celiac disease
B. Crohn's disease
C. Lactose intolerance
D. Pancreatic insufficiency
Question 2
A researcher is studying the effect of a new compound on the activity of the enzyme lactate dehydrogenase. The compound is found to inhibit the enzyme by binding to a specific site on the enzyme. What type of inhibition is this?
A. Competitive inhibition
B. Non-competitive inhibition
C. Uncompetitive inhibition
D. Mixed inhibition
Question 3
In the context of the classification of living things, which of the following kingdoms is characterized by the presence of true branching and a non-motile, photosynthetic cell wall?
A. Monera
B. Fungi
C. Plantae
D. Protista
Question 4
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Regulation of hunger and thirst
C. Regulation of blood pressure
D. Regulation of hormone secretion
Question 5
A desert e\cosystem is characterized by low precipitation and high temperatures. Which of the following adaptations would be most beneficial for a desert plant?
A. Waxy coating on leaves to prevent water loss
B. Deep roots to access groundwater
C. Small leaves to reduce transpiration
D. Thick stems to store water
Question 6
A plant has a genotype of 'Rr' for the flower color trait. If the plant is crossed with a plant that is homozygous dominant for the trait, what is the probability that the offspring will have the recessive phenotype?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 7
A study on the evolution of antibiotic resis\tance in bacteria revealed that the rate of resis\tance development is influenced by the presence of certain genes. Which of the following best describes the relationship between gene expression and antibiotic resis\tance?
A. Gene expression is directly proportional to antibiotic resis\tance.
B. Gene expression is inversely proportional to antibiotic resis\tance.
C. Gene expression has no effect on antibiotic resis\tance.
D. Gene expression is a necessary but not sufficient condition for antibiotic resis\tance.
Question 8
A patient is diagnosed with a rare genetic disorder characterized by an inability to synthesize the amino acid phenylalanine. Which of the following enzymes is most likely deficient in this patient?
A. Phenylalanine hydroxylase
B. Tyro\sine aminotransferase
C. Dihydropteridine reductase
D. GTP cyclohydrolase
Question 9
A diagram of the human nervous system is shown below. Which of the following nerves is responsible for transmitting sensory information from the skin to the brain?
A. Trigeminal nerve
B. Vagus nerve
C. Sciatic nerve
D. Optic nerve
Question 10
The process of excretion in humans involves the removal of waste products from the body through which of the following organs?
A. Liver
B. Kidneys
C. Lungs
D. Skin
Question 11
A researcher is studying the effects of antibiotics on the growth of a specific type of bacteria. The researcher notices that the bacteria are becoming increa\singly resis\tant to the antibiotic over time. What is the most likely explanation for this observation?
A. The bacteria are undergoing a process of natural selection
B. The antibiotic is being used at a suboptimal concentration
C. The bacteria are experiencing a mutation in their DNA
D. The bacteria are being exposed to a different type of antibiotic
Question 12
The growth of a plant is influenced by which of the following factors?
A. Light
B. Water
C. Temperature
D. All of the above
Question 13
The process of digestion in the human body involves the breakdown of complex molecules into simpler ones. Which of the following enzymes is responsible for breaking down proteins?
A. Amylase
B. Lipase
C. Tryp\sin
D. Lactase
Question 14
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a byproduct of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Question 15
In a tropical rainforest, the energy flow from producers to primary consumers is typically described by which of the following trophic levels?
A. Producers > Primary Consumers > Secondary Consumers
B. Producers > Primary Consumers > Tertiary Consumers
C. Producers > Primary Consumers > Decomposers
D. Producers > Primary Consumers > Omnivores

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