POST UTME ACHIEVERS UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate the amount of water in the body
B. To maintain the balance of electrolytes in the body
C. To regulate blood pressure
D. To remove waste products from the body
Question 2
A diagram of the xylem and phloem tissues in a plant stem is shown below. What is the primary function of the xylem tissue?
A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and other organic compounds from the leaves to the rest of the plant
C. Support and structure for the plant
D. Storage of nutrients and water
Question 3
A solution contains 2 M NaCl and 1 M glu\cose. If 10 mL of the solution is diluted to 100 mL, what is the concentration of NaCl in the final solution?
A. 0.2 M
B. 0.5 M
C. 1 M
D. 2 M
Question 4
A plant has a root system that consists of a taproot and a network of smaller roots. The taproot grows at a rate of 2 cm/day, while the smaller roots grow at a rate of 1 cm/day. If the taproot is 10 cm long and the smaller roots are 5 cm long, how long will it take for the taproot to be twice as long as the smaller roots?
A. 10 days
B. 20 days
C. 30 days
D. 40 days
Question 5
A population of birds is observed to have a mean beak length of 5 cm with a s\tandard deviation of 1 cm. If a sample of 10 birds is taken from this population, what is the probability that the sample mean beak length will be greater than 6 cm?
A. 0.05
B. 0.10
C. 0.20
D. 0.30
Question 6
A diagram of a simple e\cosystem is shown below. What is the role of the decomposers in this e\cosystem?
A. Primary producers
B. Primary consumers
C. Decomposers
D. Omnivores
Question 7
A diagram shows a graph with a parabola opening upwards. What is the equation of this parabola?
A. y = x^2 + 2x + 1
B. y = x^2 - 2x - 1
C. y = x^2 + 4x + 4
D. y = x^2 - 4x - 4
Question 8
A patient is diagnosed with a genetic disorder caused by a deletion of a nucleotide in the DNA sequence. The deletion results in the loss of a codon in the DNA sequence. What type of mutation is this?
A. Frameshift mutation
B. Point mutation
C. Deletion mutation
D. Insertion mutation
Question 9
In the context of nervous system coordination, what is the term for the process by which the nervous system integrates and interprets sensory information?
A. Sensory integration
B. Motor control
C. Cognitive proces\sing
D. Emotional regulation
Question 10
The hormone insulin is produced by the
A. pancreas
B. adrenal glands
C. thyroid gland
D. pituitary gland
Question 11
In the context of osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
A. To regulate the concentration of ions in the blood
B. To excrete excess water and maintain blood pressure
C. To reabsorb glu\cose and amino acids from the filtrate
D. To produce hormones that stimulate thirst
Question 12
The diagram below shows a cross-section of the human brain. Which part of the brain is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord
Question 13
A diagram shows a circuit with a battery, a resistor, and a switch. If the switch is closed, what is the direction of the current flow?
A. From the battery to the resistor
B. From the resistor to the battery
C. From the battery to the switch
D. From the switch to the resistor
Question 14
A cell is placed in a solution with a pH of 5.5. What is the concentration of hydrogen ions in this solution?
A. 10^-5.5 M
B. 10^-5.0 M
C. 10^-4.5 M
D. 10^-6.5 M
Question 15
A patient is diagnosed with a bacterial infection. The bacteria are resis\tant to multiple antibiotics. Which of the following is the most likely cause of this resis\tance?
A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation
D. Gene recombination

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