POST UTME RSU 2019 Biology | Objective

Are you preparing for POST UTME RSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the context of evolutionary theory, what is the primary mechanism by which natural selection acts on genetic variation?
A. Genetic drift
B. Gene flow
C. Mutation
Correct D. Differential reproduction

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A diagram of the xylem and phloem tissues in a plant stem is shown below. What is the primary function of the xylem tissue?
Correct A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A cell is in the process of mitosis. What is the stage of mitosis where the chromosomes are most condensed?
A. Prophase
Correct B. Metaphase
C. Anaphase
D. Telophase

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A diagram of the human eye is shown below. What is the primary function of the retina?
Correct A. Detection of light
B. Focus of light
C. Transmission of signals
D. Protection from pathogens

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A diagram of the human nervous system is shown below. What is the primary function of the spinal cord?
A. Control of voluntary movements
Correct B. Control of involuntary movements
C. Transmission of signals
D. Protection from pathogens

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
In the context of photosynthesis, what is the role of the enzyme RuBisCO in the Calvin cycle?
Correct 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

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
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
Correct B. 750
C. 900
D. 950

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
Correct A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
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?
Correct A. 0.5
B. 0.25
C. 0.75
D. 0.9

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A diagram of a neuron is shown below. Identify the part labeled 'B'.
A. D\endrite
Correct B. Axon
C. Cell body
D. Myelin sheath

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In a xylem vessel, what is the primary function of the lignin component?
Correct 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

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a photoperiod of 12 hours. What is the expected effect on the plant's growth?
Correct A. Increased growth rate due to optimal temperature
B. Decreased growth rate due to insufficient light
C. No effect on growth rate due to cons\tant temperature
D. Increased growth rate due to increased photoperiod

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
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
Correct 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

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A cell undergoes mitosis to produce two daughter cells. What is the expected effect on the cell's genetic material?
Correct A. Increased genetic material due to duplication
B. Decreased genetic material due to loss
C. No effect on genetic material due to mitosis
D. Variable genetic material due to random loss

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
A plant undergoes photosynthesis in the presence of light. What is the expected effect on the plant's energy levels?
Correct A. Increased energy levels due to light-dep\endent reactions
B. Decreased energy levels due to light-indep\endent reactions
C. No effect on energy levels due to photosynthesis
D. Variable energy levels due to random fluctuations

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
In a typical terrestrial e\cosystem, what is the primary source of energy for most food chains?
Correct A. Producers (plants and algae)
B. Consumers (herbivores and carnivores)
C. Decomposers (bacteria and fungi)
D. Detritivores (insects and worms)

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Mitochondria
Correct B. Chloroplast
C. Nucleus
D. Vacuole

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
A patient has been diagnosed with a bacterial infection. Which of the following antibiotics would be most effective against this type of infection?
A. Penicillin
B. Erythromycin
Correct C. Ciprofloxacin
D. Vancomycin

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
A diagram of the human nervous system is shown below. What is the function of the structure labeled 'B'?
A. Cerebrum
Correct B. Cerebellum
C. Brainstem
D. Spinal Cord

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
A diagram of a simple e\cosystem is shown below. What is the role of the decomposers in this e\cosystem?
A. Primary producers
B. Primary consumers
Correct C. Decomposers
D. Secondary consumers

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a photosynthetic pathway, what is the net result of the light-dep\endent reactions?
Correct A. ATP and NADPH
B. ATP and ADP
C. NADPH and FADH2
D. ATP and FADH2

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A cell undergoing mitosis has a chromosome number of 46. What is the ploidy level of this cell?
Correct A. Diploid
B. Haploid
C. Triploid
D. Tetraploid

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A population of rabbits is growing according to the \logistic growth model. If the carrying capacity is 1000 and the initial population is 100, what is the population after 5 generations?
A. 500
B. 750
C. 900
Correct D. 1000

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A plant has a genotype of BBSS. What is the probability that a seedling from this plant will be homozygous dominant for the trait?
Correct A. 0.25
B. 0.5
C. 0.75
D. 1.0

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?
A. Storage of nutrients
B. Synthesis of proteins
Correct C. Photosynthesis
D. Transport of water

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub:
Chat with Support