POST UTME RSU 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
A. It catalyzes the fixation of CO2 into a 3-carbon molecule
B. It is involved in the light-dep\endent reactions of photosynthesis
C. It is a key enzyme in the breakdown of glu\cose during respiration
D. It is responsible for the absorption of light energy in photosystem II
Question 2
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 3
A cell undergoing mitosis has a chromosome number of 46. What is the ploidy level of this cell?
A. Diploid
B. Haploid
C. Triploid
D. Tetraploid
Question 4
A diagram of the human nervous system is shown below.
A. The brain is responsible for controlling voluntary movements
B. The spinal cord transmits signals from the brain to the rest of the body
C. The nerves carry signals from sensory receptors to the brain
D. The nervous system is responsible for regulating body temperature
Question 5
In a typical terrestrial e\cosystem, what is the primary source of energy for most food chains?
A. Producers (plants and algae)
B. Consumers (herbivores and carnivores)
C. Decomposers (bacteria and fungi)
D. Detritivores (insects and worms)
Question 6
A population of rabbits is growing according to the \logistic growth model. If the initial population size is 100 and the carrying capacity is 1000, what is the population size after 5 generations?
A. 500
B. 750
C. 900
D. 950
Question 7
In the context of classification of living things, what is the primary function of the kingdom level?
A. To group organisms based on their cell structure
B. To group organisms based on their body symmetry
C. To group organisms based on their mode of nutrition
D. To group organisms based on their genetic makeup
Question 8
In a photosynthetic pathway, what is the net result of the light-dep\endent reactions?
A. ATP and NADPH
B. ATP and ADP
C. NADPH and FADH2
D. ATP and FADH2
Question 9
In a xylem vessel, what is the primary function of the lignin component?
A. To provide structural support to the vessel
B. To facilitate the transport of water and minerals
C. To regulate the rate of transpiration
D. To absorb water and minerals from the soil
Question 10
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole
Question 11
A diagram of the human nervous system is shown below. What is the primary function of the spinal cord?
A. Control of voluntary movements
B. Control of involuntary movements
C. Transmission of signals
D. Protection from pathogens
Question 12
A 0.50-L sample of a solution containing 0.10 M NaOH is mixed with a 0.50-L sample of a solution containing 0.10 M HCl. What is the pH of the resulting solution?
A. 7.0
B. 8.0
C. 9.0
D. 10.0
Question 13
A diagram of a neuron is shown below. Identify the part labeled 'B'.
A. D\endrite
B. Axon
C. Cell body
D. Myelin sheath
Question 14
A genetic cross is performed between two true-breeding lines of peas. One line has green seeds and the other line has yellow seeds. What is the probability that a heterozygous offspring will produce green seeds?
A. 0.5
B. 0.25
C. 0.75
D. 0.9
Question 15
A person with a genetic disorder has a mutation in the HBB gene that codes for the \beta-globin subunit of hemoglobin. What is the expected effect on the person's hemoglobin levels?
A. Increased hemoglobin levels due to overexpression of the HBB gene
B. Decreased hemoglobin levels due to underexpression of the HBB gene
C. No effect on hemoglobin levels due to the mutation
D. Variable hemoglobin levels due to the genetic disorder

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