POST UTME LAUTECH 2018 Biology | Objective

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Question 1
A diagram of the human nervous system is shown below. Which of the following structures is responsible for the transmission of nerve impulses?
A. A
B. B
C. C
D. D
Question 2
A certain species of animal has a metabolic rate of 120 W. If the animal is at rest, what is the rate of heat production?
A. 120 W
B. 240 W
C. 360 W
D. 480 W
Question 3
A plant is placed in a controlled environment with a cons\tant temperature and humidity. Which of the following growth regulators would be most active in this situation?
A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene
Question 4
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is a reac\tant in the light-dep\endent reactions?
A. Water
B. Carbon dioxide
C. Light energy
D. Oxygen
Question 5
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 6
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the immune system
D. Regulation of electrolyte balance
Question 7
In the context of gas exchange, what is the primary function of the alveolar-capillary membrane?
A. To regulate the amount of oxygen and carbon dioxide exchanged between the lungs and the bloodstream
B. To facilitate the diffusion of oxygen and carbon dioxide across the membrane
C. To maintain the pH balance of the blood
D. To regulate the amount of water in the lungs
Question 8
In the context of reproduction, what is the term for the process by which an organism produces offspring without the involvement of gametes?
A. Asexual reproduction
B. Sexual reproduction
C. Mitosis
D. Meiosis
Question 9
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic Drift
C. Natural Selection
D. Heritability
Question 10
The enzyme lactase is responsible for the breakdown of lactose in the small intestine. Which of the following is a characteristic of lactase?
A. It is a glycoprotein
B. It is a metalloenzyme
C. It is a coenzyme
D. It is a substrate
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 homozygous dominant genotype 'AA'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 12
In the process of cellular respiration, which of the following is a product of the citric acid cycle?
A. ATP
B. NADH
C. FADH2
D. Pyruvate
Question 13
The process of excretion in plants involves the removal of excess
A. Water and ions
B. Excess sugars and amino acids
C. Waste products such as urea and creatinine
D. Excess salts and minerals
Question 14
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the regulation of blood pressure?
A. A
B. B
C. C
D. D
Question 15
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

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