POST UTME LAUTECH 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of Drosophila melanogaster is being studied for its genetic variation. Which of the following types of genetic variation would be most likely to result in a change in the population's phenotype?
A. Genetic drift
B. Mutation
C. Gene flow
D. Natural selection
Question 2
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 3
A cell undergoing mitosis has a nuclear envelope that is
A. Intact and double-membraned
B. Perforated and \single-membraned
C. Disrupted and absent
D. Condensed and fragmented
Question 4
In the context of osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate pH levels in the blood
B. To maintain the balance of electrolytes in the body
C. To regulate the concentration of glu\cose in the blood
D. To remove waste products from the body
Question 5
A patient with kidney disease is experiencing symptoms of fluid overload. What is the primary function of the kidneys that is impaired in this condition?
A. Excretion of waste products
B. Regulation of electrolyte balance
C. Maintenance of acid-base balance
D. Osmoregulation
Question 6
A population of rabbits is growing exponentially in a controlled environment. If the initial population is 100 rabbits and the growth rate is 20% per year, what will be the population size after 5 years?
A. 1000
B. 2000
C. 4000
D. 8000
Question 7
A population of E. coli is being studied for its genetic variation. Which of the following types of genetic variation would be most likely to result in a change in the population's phenotype?
A. Genetic drift
B. Mutation
C. Gene flow
D. Natural selection
Question 8
Which of the following organs is primarily responsible for regulating the body's osmotic balance?
A. Kidneys
B. Liver
C. Pancreas
D. Adrenal glands
Question 9
A researcher isolates a bacterium that exhibits the phenomenon of chemotaxis. Which of the following is a characteristic of chemotaxis?
A. The movement of bacteria towards a nutrient source
B. The movement of bacteria away from a toxic subs\tance
C. The movement of bacteria in response to temperature changes
D. The movement of bacteria in response to pH changes
Question 10
A cell is in the G2 phase of the cell cycle. What is the primary function of the cyclin-dep\endent kinase (CDK) in this phase?
A. To regulate the progression from G1 to S phase
B. To regulate the progression from G2 to M phase
C. To regulate the progression from S to G2 phase
D. To regulate the progression from M to G1 phase
Question 11
A diagram of a plant cell is shown below. Which of the following structures is responsible for photosynthesis?
A. A
B. B
C. C
D. D
Question 12
In the context of coordination, what is the primary function of the cerebellum?
A. To regulate muscle tone and posture
B. To integrate sensory information from the environment
C. To coordinate voluntary movements
D. To regulate autonomic functions
Question 13
In a typical xylem vessel, what is the primary function of the lignin?
A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of transpiration
D. To prevent the collapse of the vessel
Question 14
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Modulation of the immune response
C. Stimulation of the reproductive system
D. Maintenance of electrolyte balance
Question 15
Which of the following hormones is primarily responsible for regulating the reproductive cycle in females?
A. Insulin
B. Growth hormone
C. Thyroid-stimulating hormone
D. Estrogen

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