POST UTME UNILAG 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the process by which cells divide and produce daughter cells with the same number of chromosomes as the parent cell?
A. Mitosis
B. Meiosis
C. Binary fission
D. Endoreduplication
Question 2
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Active transport
B. Passive diffusion
C. Osmosis
D. Filtration
Question 3
A species of bacteria has a generation time of 2 hours. If the population size is 10^6, what is the rate of increase per hour?
A. 0.001
B. 0.01
C. 0.1
D. 1.0
Question 4
The diagram below shows the structure of a plant cell. What is the function of the vacuole?
A. To store water and nutrients
B. To synthesize proteins
C. To regulate the cell cycle
D. To produce the cell wall
Question 5
In a typical nervous system, the neurotransmitter acetylcholine is released from the axon terminal of a motor neuron and binds to receptors on the muscle fiber. This binding causes a conformational change in the receptor, which in turn opens ion channels and allows positively charged ions to flow into the muscle fiber. What is the primary mechanism by which acetylcholine exerts its effect on the muscle fiber?
A. allosteric modulation
B. competitive inhibition
C. non-competitive inhibition
D. agonism
Question 6
The process of meiosis is shown below. What is the stage of meiosis where the homo\logous chromosomes are separated?
A. Prophase I
B. Metaphase I
C. Anaphase I
D. Telophase I
Question 7
A plant with the genotype AaBb is crossed with a plant with the genotype AaBb. What is the probability that the offspring will have the genotype AaBb?
A. 0.25
B. 0.50
C. 0.75
D. 0.90
Question 8
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. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 9
A diagram of a plant cell is shown below. What is the function of the cell wall?
A. To provide structural support to the cell
B. To regulate the movement of materials in and out of the cell
C. To synthesize proteins
D. To store genetic information
Question 10
A species of bacteria has a generation time of 2 hours. If the population size is 10^6, what is the rate of increase per hour?
A. 0.001
B. 0.01
C. 0.1
D. 1.0
Question 11
A patient has a blood glu\cose level of 120 mg/dL. If the patient is administered a dose of insulin that increases the rate of glu\cose uptake by the cells by 20%, what is the expected change in blood glu\cose level after 2 hours?
A. 80 mg/dL
B. 96 mg/dL
C. 112 mg/dL
D. 128 mg/dL
Question 12
In the context of genetics, what is the primary function of the centriole in the cell?
A. To form the spindle fibers during cell division
B. To synthesize the genetic material during DNA replication
C. To regulate the cell cycle
D. To produce the flagella in eukaryotic cells
Question 13
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. 1.0
Question 14
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. 0.36
B. 0.64
C. 0.72
D. 0.80
Question 15
The process of mitosis is shown below. What is the stage of mitosis where the chromosomes are condensed and attached to the spindle fibers?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

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