POST UTME UNILAG 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a human digestive system is shown below. Identify the part labeled 'B'.
A. Esophagus
B. Stomach
C. Small Intestine
D. Large Intestine
Question 2
In the context of hormonal coordination, what is the primary function of the hypothalamus?
A. Regulation of body temperature
B. Control of hunger and thirst
C. Maintenance of homeostasis
D. Stimulation of reproductive hormones
Question 3
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 4
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 5
In the context of evolutionary theory, what is the primary mechanism by which genetic drift leads to the loss of genetic variation in a population?
A. Genetic recombination
B. Mutation
C. Gene flow
D. Genetic drift
Question 6
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 7
In the xylem, what is the primary function of the tracheids?
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 structural functions
D. Storage of food and water
Question 8
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 9
A plant grows in a pot with a mixture of soil and sand. The plant's growth rate is 2.5 cm/day. If the soil-to-sand ratio is 3:1, what is the growth rate of the plant in the sand?
A. 1.7 cm/day
B. 2.1 cm/day
C. 2.5 cm/day
D. 3.1 cm/day
Question 10
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 11
A 2.5-liter solution contains 1.8 liters of ethanol and 0.7 liters of water. What is the mole \fraction of ethanol?
A. 0.64
B. 0.68
C. 0.72
D. 0.76
Question 12
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the following protein kinase:
A. CDK1
B. CDK2
C. CDK3
D. CDK4
Question 13
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 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. 0.64
B. 0.36
C. 0.48
D. 0.16
Question 15
The process of meiosis is initiated by the replication of the chromosomes, which is followed by the separation of the homo\logous chromosomes during the following stage:
A. Prophase I
B. Metaphase I
C. Anaphase I
D. Telophase I

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