POST UTME ESUT 2019 Biology | Objective

Are you preparing for POST UTME ESUT 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 osmoregulation, what is the primary function of the kidneys in maintaining electrolyte balance?
Correct A. To regulate the concentration of ions in the blood
B. To remove excess water from the body
C. To maintain acid-base balance
D. To regulate blood pressure

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A geneticist is studying the inheri\tance of a particular trait in a population. Which of the following types of genetic variation would be most likely to result in a change in the frequency of the trait?
A. Mutation
B. Gene flow
C. Genetic drift
Correct D. Natural selection

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A diagram of the human nervous system is shown below. Identify the part labeled A.
Correct A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A bio\logist is studying the structure of a plant cell. Which of the following organelles is responsible for photosynthesis?
A. Mitochondria
Correct B. Chloroplast
C. Endoplasmic reticulum
D. Lysosome

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A diagram of a simple circuit is shown below. What is the total resis\tance of the circuit?
Correct A. R1 + R2
B. R1 - R2
C. R1 x R2
D. R1 / R2

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
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'?
Correct A. 0.64
B. 0.36
C. 0.16
D. 0.04

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a photoperiod of 12 hours light and 12 hours darkness. If the plant is in the vegetative stage, what is the expected effect on the plant's growth rate if the temperature is increased to 30°C?
A. Increased growth rate
Correct B. Decreased growth rate
C. No change in growth rate
D. Variable growth rate

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A 2.0 L solution contains 0.1 M glu\cose. If 10 mL of this solution is diluted to 100 mL, what is the concentration of glu\cose in the final solution?
A. 0.01 M
Correct B. 0.02 M
C. 0.05 M
D. 0.1 M

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A neuron has a resting potential of -70 mV. If the neuron is depolarized to -50 mV, what is the change in membrane potential?
Correct A. -20 mV
B. -10 mV
C. +10 mV
D. +20 mV

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A 50 kg person is running at a speed of 5 m/s. If the person's metabolic rate is 200 W, what is the rate of heat production?
A. 100 W
Correct B. 200 W
C. 300 W
D. 400 W

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
The process of diffusion in a cell membrane is facilitated by the presence of what type of proteins?
A. Carrier proteins
Correct B. Channel proteins
C. Transport proteins
D. Enzyme proteins

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
In the context of eco\logical succession, what is the term for the initial stage of a new e\cosystem?
Correct A. Pioneer stage
B. Climax stage
C. Intermediate stage
D. Succession stage

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
The process of photosynthesis in plants involves the conversion of light energy into what type of energy?
Correct A. Chemical energy
B. Thermal energy
C. Electrical energy
D. Mechanical energy

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
The xylem tissue in plants is responsible for transporting what type of subs\tance?
Correct A. Water and minerals
B. Sugars and amino acids
C. Oxygen and carbon dioxide
D. Hormones and nutrients

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
The theory of evolution by natural selection was first proposed by what scientist?
Correct A. Charles Darwin
B. Gregor M\endel
C. Jean-Baptiste Lamarck
D. Alfred Russel Wallace

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
The process of meiosis results in the production of four haploid cells from a diploid cell. Which of the following is a characteristic of the cells produced during meiosis?
A. They have the same number of chromosomes as the parent cell
Correct B. They have half the number of chromosomes as the parent cell
C. They have a mix of maternal and paternal chromosomes
D. They have a different ploidy level than the parent cell

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
In the context of the classification of living things, what is the primary function of the kingdom level?
Correct A. To group organisms based on their physical characteristics
B. To group organisms based on their genetic makeup
C. To group organisms based on their metabolic processes
D. To group organisms based on their eco\logical niches

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
The xylem and phloem are two types of vascular tissues found in plants. Which of the following is a primary function of the xylem?
Correct 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 provide structural support to the plant
D. To regulate the plant's water balance

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
The process of evolution is driven by the accumulation of genetic variation over time. Which of the following is a mechanism that contributes to genetic variation?
A. Mutation
B. Gene flow
C. Genetic drift
Correct D. All of the above

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
The reproductive system of a plant consists of the male and female reproductive organs. Which of the following is a characteristic of the female reproductive organ?
A. It produces pollen
Correct B. It produces ovules
C. It produces nectar
D. It produces seeds

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'R'?
Correct A. 0.8
B. 0.6
C. 0.4
D. 0.2

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A plant cell has a cell wall composed of cellulose, hemicellulose, and pectin. Which of the following is NOT a function of the cell wall?
A. Support and protection
Correct B. Storage of nutrients
C. Regulation of cell growth
D. Transport of subs\tances

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A diagram of a mitotic spindle is shown below. What is the function of the microtubules in the spindle?
Correct A. To separate chromosomes during anaphase
B. To form the nuclear envelope during telophase
C. To condense chromosomes during prophase
D. To form the spindle fibers during metaphase

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A diagram of a photosynthesis reaction is shown below. What is the role of the enzyme RuBisCO in the reaction?
Correct A. To fix CO2 into a 3-carbon molecule
B. To convert RuBP into a 3-carbon molecule
C. To convert a 3-carbon molecule into RuBP
D. To convert CO2 into a 3-carbon molecule

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A diagram of a human kidney is shown below. What is the function of the renal corpuscle in the kidney?
Correct A. To filter waste products from the blood
B. To regulate blood pressure
C. To produce hormones
D. To regulate electrolyte balance

Correct Answer: A

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