POST UTME UI 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of eco\logical succession in a newly formed volcanic island is an example of
A. primary succession
B. secondary succession
C. climax community
D. eco\logical balance
Question 2
In a population of 1000 individuals, 20% are heterozygous for a particular gene and 30% are homozygous recessive. What is the frequency of the dominant allele?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 3
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 glu\cose levels
C. Stress response and adaptation
D. Regulation of appetite and satiety
Question 4
The diagram below shows the structure of a human brain. Which of the following is the correct function of the cerebral cortex?
A. Regulating the heartbeat
B. Regulating the blood pressure
C. Regulating the blood flow
D. Proces\sing sensory information
Question 5
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?
A. 0.25\sqrt{10}
B. 0.5\sqrt{10}
C. 0.75\sqrt{10}
D. 1.0\sqrt{10}
Question 6
A person with a blood type of AB+ has a child with a person with a blood type of A-. What is the blood type of the child?
A. A-
B. A+
C. AB-
D. O-
Question 7
The sense organ responsible for detecting changes in sound pressure is the
A. cochlea
B. stapes
C. tympanic membrane
D. auditory nerve
Question 8
A 5 kg block is moving at a speed of 2 m/s on a frictionless surface. If the block is subjected to a cons\tant force of 10 N, what is the acceleration of the block?
A. 1
B. 2
C. 3
D. 4
Question 9
The nervous system's coordination of muscle contractions is primarily mediated by the
A. somatic nervous system
B. autonomic nervous system
C. sympathetic nervous system
D. parasympathetic nervous system
Question 10
A cell in interphase has a DNA content of 2C. If the cell undergoes mitosis, what will be the DNA content of the daughter cells?
A. 2C
B. 4C
C. 6C
D. 8C
Question 11
The microorganism responsible for cau\sing tuberculosis is
A. Mycobacterium tuberculosis
B. Staphylococcus aureus
C. Escherichia coli
D. Salmonella typhi
Question 12
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 1
B. 7
C. 10
D. 14
Question 13
A plant is placed in a solution with a high concentration of sucrose. Which of the following is a likely effect on the plant's growth?
A. Increased growth rate due to increased water potential
B. Decreased growth rate due to decreased water potential
C. No effect on growth rate
D. Increased growth rate due to increased turgor pressure
Question 14
The genetic variation in a population is increased by
A. mutation
B. genetic drift
C. gene flow
D. natural selection
Question 15
The diagram below shows the structure of a human eye. Which of the following is the correct function of the lens?
A. Focu\sing light on the retina
B. Focu\sing light on the cornea
C. Focu\sing light on the lens
D. Focu\sing light on the pupil

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