POST UTME PAN-ATLANTIC UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?
A. To store water
B. To synthesize proteins
C. To generate energy
D. To store waste products
Question 2
A diagram of the human eye is shown below.
A. The cornea is responsible for focu\sing light onto the retina
B. The lens is responsible for changing the focal length of the eye
C. The retina is responsible for converting light into electrical signals
D. The optic nerve is responsible for transmitting visual information to the brain
Question 3
A solution of 0.1 M NaCl is mixed with a solution of 0.1 M NaOH. What is the pH of the resulting solution?
A. 7
B. 8
C. 9
D. 10
Question 4
In the context of transport systems, what is the primary function of the xylem in plants?
A. To transport water and minerals from the roots to the leaves
B. To transport sugars and other organic compounds from the leaves to the rest of the plant
C. To transport gases between the leaves and the rest of the plant
D. To regulate water potential in the plant
Question 5
A cell is placed in a solution with a pH of 5.5. If the cell membrane has a permeability coefficient of 10^-6 cm/s, what is the rate of diffusion of hydrogen ions into the cell?
A. 10^-6 cm/s
B. 10^-5 cm/s
C. 10^-4 cm/s
D. 10^-3 cm/s
Question 6
The study of the structure, behavior, and evolution of the universe is known as?
A. Astronomy
B. Astrophysics
C. Cosmo\logy
D. Geo\logy
Question 7
In the context of M\endelian genetics, what is the term for the phenomenon where a dominant allele masks the effect of a recessive allele?
A. Incomplete dominance
B. Codominance
C. Pleiotropy
D. Heterosis
Question 8
The process by which an organism's genetic information is passed from one generation to the next is known as?
A. Heritability
B. Inheri\tance
C. Mutation
D. Genetic Drift
Question 9
A population of E. coli has a mean fitness of 0.8. If the population size is 10^6, what is the expected number of individuals with a fitness of 0.9?
A. 8000
B. 10000
C. 12000
D. 14000
Question 10
In a tropical rainforest, the primary consumers are primarily composed of what type of organisms?
A. Herbivores
B. Carnivores
C. Decomposers
D. Detritivores
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. 0.9
Question 12
In a desert e\cosystem, the primary producers are primarily composed of what type of organisms?
A. Cacti
B. Succulents
C. Mosses
D. Lichens
Question 13
A solution of 0.1 M NaCl is mixed with a solution of 0.1 M NaOH. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 14
The hormone insulin is produced by which of the following glands?
A. Pituitary gland
B. Thyroid gland
C. Pancreas
D. Adrenal gland
Question 15
A species of bird has a population size of 1000 and is growing at a rate of 10% per year. If the carrying capacity is 5000, what is the value of the intrinsic growth rate (r) in the \logistic growth equation?
A. 0.1
B. 0.2
C. 0.3
D. 0.4

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