POST UTME BABCOCK UNIVERSITY 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process by which plants absorb water and minerals from the soil is known as
A. transpiration
B. respiration
C. photosynthesis
D. translocation
Question 2
The diagram below shows the structure of a plant cell. Identify the part labeled B
A. mitochondria
B. ribosome
C. lysosome
D. vacuole
Question 3
A 25-year-old woman presents with a 2-year history of infertility. Her menstrual cycles are regular, and her karyotype is 46,XX. Which of the following is the most likely diagnosis?
A. Polycystic ovary syndrome
B. Endometriosis
C. Tubal ligation
D. Premature ovarian failure
Question 4
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. 0.48
B. 0.36
C. 0.64
D. 0.52
Question 5
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a relative humidity of 60%. What is the expected rate of transpiration?
A. 0.05 g H2O/g dry matter/h
B. 0.10 g H2O/g dry matter/h
C. 0.15 g H2O/g dry matter/h
D. 0.20 g H2O/g dry matter/h
Question 6
A plant cell undergoes asexual reproduction by producing a callus. What is the primary function of the callus?
A. To produce a new plant
B. To repair damaged tissue
C. To store nutrients
D. To regulate water balance
Question 7
A diagram of the nephron is shown below. Identify the part labeled 'A' and describe its function in the process of filtration.
A. The Bowman's capsule, where filtration occurs
B. The proximal convoluted tubule, where reabsorption occurs
C. The loop of Henle, where water and electrolytes are reabsorbed
D. The distal convoluted tubule, where fine-tuning of electrolyte balance occurs
Question 8
A 5% glu\cose solution is prepared by dissolving 5g of glu\cose in 95g of water. What is the molarity of the solution?
A. 0.0309
B. 0.309
C. 3.09
D. 30.9
Question 9
Which of the following is an example of a symbiotic relationship in the e\cosystem?
A. Predator-prey relationship
B. Mutualism between clownfish and sea anemone
C. Competition between two species
D. Commensalism between two species
Question 10
What is the primary function of the root hairs in a plant?
A. To absorb water and minerals from the soil
B. To produce xylem sap
C. To store water and minerals
D. To regulate the rate of xylem sap flow
Question 11
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. 0.5
C. 0.75
D. 1
Question 12
A 10% solution of NaOH is prepared by dissolving 10g of NaOH in 90g of water. What is the molarity of the solution?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 13
What is the term for the process by which plants convert light energy into chemical energy?
A. Respiration
B. Photosynthesis
C. Decomposition
D. Fermentation
Question 14
A diagram of the respiratory system is shown below. Identify the part labeled 'B' and describe its function in the process of gas exchange.
A. The pharynx, where food and air are separated
B. The trachea, where air is divided into the bronchi
C. The bronchi, where air is further divided into smaller airways
D. The lungs, where gas exchange occurs
Question 15
The process by which plants convert light energy into chemical energy is known as
A. photosynthesis
B. respiration
C. transpiration
D. translocation

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