POST UTME UI 2023 Biology | Objective

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Question 1 View Details
In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of a particular enzyme. If 20% of the population is homozygous recessive, what is the frequency of the recessive allele?
Correct A. 0.2
B. 0.3
C. 0.4
D. 0.5

Correct Answer: A

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Question 2 View Details
A plant with a genotype of BB is crossed with a plant with a genotype of bb. What is the probability that the offspring will have a genotype of Bb?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

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Question 3 View Details
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. to synthesize proteins
Correct B. to store genetic information
C. to regulate cell growth
D. to transport materials

Correct Answer: B

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Question 4 View Details
A diagram of a nervous system is shown below. What is the function of the structure labeled 'B'?
Correct A. to transmit signals
B. to store information
C. to regulate body temperature
D. to control movement

Correct Answer: A

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Question 5 View Details
A diagram of a hormonal system is shown below. What is the function of the structure labeled 'C'?
A. to regulate growth
B. to control metabolism
C. to stimulate reproduction
Correct D. to maintain homeostasis

Correct Answer: D

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Question 6 View Details
In the process 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
Correct C. To pump protons across the mitochondrial membrane
D. To reduce oxygen to water

Correct Answer: C

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Question 7 View Details
A patient is diagnosed with a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most likely to be effective against this bacterium?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
Correct D. Vancomycin

Correct Answer: D

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Question 8 View Details
A plant's xylem is responsible for transporting what subs\tance from the roots to the leaves?
Correct A. Water and minerals
B. Sugars and amino acids
C. Hormones and nutrients
D. Oxygen and carbon dioxide

Correct Answer: A

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Question 9 View Details
A scientist is studying the classification of living organisms. Which of the following kingdoms is characterized by the presence of cell walls made of chitin?
A. Animalia
Correct B. Fungi
C. Plantae
D. Protista

Correct Answer: B

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Question 10 View Details
A plant undergoes photosynthesis to produce what type of sugar?
Correct A. Glu\cose
B. Fructose
C. Sucrose
D. Lactose

Correct Answer: A

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Question 11 View Details
In the context of evolutionary bio\logy, what is the primary mechanism driving the process of speciation in a population of organisms?
A. Genetic drift
B. Mutation
C. Gene flow
Correct D. Natural selection

Correct Answer: D

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Question 12 View Details
A diagram of a plant cell is shown below. Identify the organelle responsible for photosynthesis.
A. Mitochondria
B. Vacuole
Correct C. Chloroplast
D. Nucleus

Correct Answer: C

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Question 13 View Details
A patient is diagnosed with a bacterial infection. The bacteria are resis\tant to multiple antibiotics. What is the most likely mechanism of resis\tance?
Correct A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation
D. Gene expression

Correct Answer: A

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Question 14 View Details
A diagram of the human digestive system is shown below. Identify the organ responsible for the absorption of nutrients.
A. Stomach
B. Pancreas
Correct C. Small intestine
D. Liver

Correct Answer: C

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Question 15 View Details
A diagram of the human respiratory system is shown below. Identify the organ responsible for gas exchange.
A. Trachea
B. Diaphragm
Correct C. Lungs
D. Bronchi

Correct Answer: C

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Question 16 View Details
In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating body temperature?
A. Producing hormones that stimulate the thyroid gland
Correct B. Regulating body temperature through the pituitary gland
C. Stimulating the adrenal glands to produce cortisol
D. Producing hormones that inhibit the thyroid gland

Correct Answer: B

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Question 17 View Details
A diagram of the xylem and phloem tissues in a plant stem is shown below. Which of the following statements is true regarding the xylem tissue?
Correct A. It transports water and minerals from the roots to the leaves
B. It transports sugars and amino acids from the leaves to the roots
C. It transports water and minerals from the leaves to the roots
D. It transports sugars and amino acids from the roots to the leaves

Correct Answer: A

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Question 18 View Details
A diagram of the human nervous system is shown below. Which of the following statements is true regarding the cerebellum?
A. It is responsible for controlling voluntary movements
B. It is responsible for regulating body temperature
C. It is responsible for proces\sing sensory information
Correct D. It is responsible for controlling involuntary movements

Correct Answer: D

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Question 19 View Details
A diagram of the human digestive system is shown below. Which of the following statements is true regarding the small intestine?
A. It is responsible for absorbing water and electrolytes
B. It is responsible for breaking down proteins and carbohydrates
Correct C. It is responsible for absorbing vitamins and minerals
D. It is responsible for absorbing fats and oils

Correct Answer: C

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Question 20 View Details
A diagram of the human circulatory system is shown below. Which of the following statements is true regarding the heart?
Correct A. It pumps blood to the lungs for oxygenation
B. It pumps blood to the body for oxygenation
C. It pumps blood to the heart for oxygenation
D. It pumps blood to the liver for oxygenation

Correct Answer: A

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Question 21 View Details
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 homozygous dominant genotype 'AA'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.04

Correct Answer: A

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Question 22 View Details
A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?
A. Trachea
Correct B. Lungs
C. Diaphragm
D. Bronchi

Correct Answer: B

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Question 23 View Details
The following diagram shows a cross-section of a plant root. What is the function of the structure labeled 'A'?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens

Correct Answer: A

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Question 24 View Details
A diagram of the human excretory system is shown below. Which of the following structures is responsible for the reabsorption of glu\cose?
A. Kidneys
Correct B. Renal tubules
C. Ureters
D. Bladder

Correct Answer: B

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Question 25 View Details
The following diagram shows a cross-section of a human cell. What is the function of the structure labeled 'A'?
A. Site of protein synthesis
Correct B. Site of cellular respiration
C. Site of cell signaling
D. Site of cell division

Correct Answer: B

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