POST UTME UNILAG 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Cell Wall
D. Chloroplast
Question 2
A diagram of a plant cell is shown below. Identify the organelle responsible for photosynthesis.
A. Mitochondria
B. Vacuole
C. Chloroplast
D. Nucleus
Question 3
What is the primary difference between asexual and sexual reproduction in terms of genetic variation?
A. Asexual reproduction results in offspring with identical genetic makeup, while sexual reproduction results in offspring with unique genetic combinations
B. Asexual reproduction results in offspring with unique genetic combinations, while sexual reproduction results in offspring with identical genetic makeup
C. Asexual reproduction results in offspring with increased genetic variation, while sexual reproduction results in offspring with decreased genetic variation
D. Asexual reproduction results in offspring with decreased genetic variation, while sexual reproduction results in offspring with increased genetic variation
Question 4
A population of rabbits grows according to the \logistic equation dN/dt = rN\( 1-N/K \). If the initial population size is 100, the carrying capacity is 1000, and the growth rate is 0.5, what is the population size at time t = 10?
A. 500
B. 600
C. 700
D. 800
Question 5
In the context of evolutionary theory, what is the primary mechanism by which species adapt to their environment?
A. Natural Selection
B. Genetic Drift
C. Mutation
D. Gene Flow
Question 6
In the context of eco\logical cycles, what is the primary function of decomposers?
A. Produce organic compounds
B. Break down dead organisms and recycle nutrients
C. Produce oxygen through photosynthesis
D. Regulate the water cycle
Question 7
A 10-liter solution contains 5 liters of H2O and 3 liters of HCl. What is the pH of the solution?
A. 0.5
B. 1.0
C. 1.5
D. 2.0
Question 8
A diagram of a human eye is shown below. Identify the part labeled 'C'.
A. Lens
B. Iris
C. Retina
D. Cornea
Question 9
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. 0.64
B. 0.36
C. 0.48
D. 0.16
Question 10
A diagram of a human immune system is shown below. Identify the organ responsible for the production of antibodies.
A. Lymph nodes
B. Bone marrow
C. Spleen
D. Thymus
Question 11
The process of protein synthesis involves the translation of messenger RNA (mRNA) into a polypeptide chain, which is initiated by the binding of the following tRNA molecule to the ribosome:
A. tRNA-Met
B. tRNA-Gln
C. tRNA-Glu
D. tRNA-Arg
Question 12
A diagram of the human kidney is shown below. Which part of the kidney is responsible for filtering waste products from the blood?
A. Cortex
B. Medulla
C. Papilla
D. Nephron
Question 13
A diagram of a human brain is shown below. What is the function of the cerebellum?
A. Regulates body temperature
B. Maintains balance and coordination
C. Processes sensory information
D. Produces hormones
Question 14
A diagram of a human circulatory system is shown below. Identify the organ responsible for the regulation of blood pressure.
A. Kidneys
B. Arterioles
C. Heart
D. Capillaries
Question 15
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 120
B. 200
C. 240
D. 280

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