POST UTME LAUTECH 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Through the reabsorption of ions in the proximal convoluted tubule
B. Through the secretion of ions in the distal convoluted tubule
C. Through the regulation of hormone levels
D. Through the filtration of ions in the glomerulus
Question 2
A 2.0 L flask contains 0.5 mol of an ideal gas at a temperature of 300 K. What is the pressure of the gas?
A. 1.0
B. 2.1
C. 3.2
D. 4.3
Question 3
What is the primary mechanism by which the lungs exchange oxygen and carbon dioxide?
A. Through the diffusion of gases across the alveolar-capillary membrane
B. Through the contraction of diaphragmatic muscle fibers
C. Through the regulation of hormone levels
D. Through the transmission of electrical signals along the phrenic nerve
Question 4
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 5
In a eukaryotic cell, which organelle is responsible for the synthesis of proteins?
A. Mitochondria
B. Chloroplast
C. Endoplasmic reticulum
D. Ribosome
Question 6
In a population of 1000 individuals, 50% are heterozygous for the sickle cell gene, 30% are homozygous dominant, and 20% are homozygous recessive. What is the expected frequency of the sickle cell allele in this population?
A. 0.25
B. 0.3
C. 0.35
D. 0.4
Question 7
A population of bacteria is growing exponentially. If the initial population is 100 and the growth rate is 20% per hour, what is the population after 3 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 8
A diagram of the human eye is shown below. Which of the following statements is TRUE?
A. The cornea is the outermost layer of the eye.
B. The iris controls the amount of light entering the eye.
C. The lens changes shape to focus on objects at different dis\tances.
D. The retina contains photoreceptor cells called rods and cones.
Question 9
A 25-year-old woman is diagnosed with polycystic ovary syndrome (PCOS). Which of the following is a common feature of PCOS?
A. Hirsutism
B. Ovulatory dysfunction
C. Hyperandrogenism
D. All of the above
Question 10
In a photosynthetic pathway, which of the following is the primary acceptor of light energy?
A. Chlorophyll a
B. Chlorophyll b
C. Pheophytin
D. Plastocyanin
Question 11
A gas exchange system is being studied in a plant. Which of the following is a characteristic of the stomata?
A. The stomata are responsible for the uptake of CO2 from the atmosphere
B. The stomata are responsible for the release of O2 into the atmosphere
C. The stomata are responsible for the regulation of water loss from the plant
D. The stomata are responsible for the regulation of temperature in the plant
Question 12
In the process of meiosis, what is the primary purpose of cros\sing over?
A. To increase genetic variation
B. To decrease genetic variation
C. To increase the number of chromosomes
D. To decrease the number of chromosomes
Question 13
A solution of 0.1 M NaCl is prepared by dissolving 6.0 g of NaCl in 100 mL of water. What is the concentration of the solution in mol/L?
A. 0.3
B. 0.6
C. 0.9
D. 1.2
Question 14
A genetic cross is performed between two pea plants. One plant is homozygous dominant for the trait and the other plant is homozygous recessive. What is the probability that the offspring will be homozygous dominant?
A. 0.5
B. 0.25
C. 0.75
D. 0.9
Question 15
A plant root grows in a medium containing a mixture of nutrients. Which of the following transport systems is responsible for the uptake of these nutrients?
A. Xylem
B. Phloem
C. Endodermis
D. Pericycle

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