POST UTME UI 2021 Biology | Objective

Are you preparing for POST UTME UI exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 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 classification of living things, which of the following is an example of a characteristic that is used to distinguish between prokaryotic and eukaryotic cells?
Correct A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Presence of ribosomes

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A diagram of the human eye is shown below. Which of the following is the correct function of the part labeled 'A'?
Correct A. To focus light on the retina
B. To detect light intensity
C. To regulate pupil size
D. To produce tears

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A patient has been diagnosed with a bacterial infection. Which of the following antibiotics is most likely to be effective against this type of infection?
A. Penicillin
Correct B. Ciprofloxacin
C. Vancomycin
D. Metronidazole

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A diagram of the human nervous system is shown below. Which of the following is the correct function of the part labeled 'B'?
Correct A. To transmit nerve impulses
B. To regulate body temperature
C. To produce hormones
D. To filter blood

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A patient has been diagnosed with a kidney disease. Which of the following is the correct function of the part labeled 'C'?
A. To filter blood
B. To regulate blood pressure
Correct C. To produce urine
D. To store waste

Correct Answer: C

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'?
A. 0.36
Correct B. 0.64
C. 0.48
D. 0.72

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A 2.5-liter solution contains 1.8 liters of ethanol and 0.7 liters of water. What is the mole \fraction of ethanol in the solution?
A. 0.64
Correct B. 0.72
C. 0.80
D. 0.88

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'RR'?
A. 0.25
Correct B. 0.5
C. 0.75
D. 0.9

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A population of 1000 rabbits is introduced to an island. The population grows at a rate of 20% per year. What is the population size after 5 years?
A. 2500
Correct B. 3185.31
C. 4000
D. 5000

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A 50-liter solution contains 30 liters of ethanol and 20 liters of water. What is the mole \fraction of ethanol in the solution?
A. 0.4
Correct B. 0.6
C. 0.8
D. 1.0

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
Correct A. 0.36
B. 0.64
C. 0.16
D. 0.04

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A neuron has a resting potential of -70mV. If it is depolarized by 20mV, what is the new membrane potential?
A. -50mV
B. -90mV
Correct C. -60mV
D. -80mV

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the light intensity is increased by 50%, what is the new photosynthetic rate?
A. 15 μmol CO2 s-1
Correct B. 20 μmol CO2 s-1
C. 12.5 μmol CO2 s-1
D. 25 μmol CO2 s-1

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A population of rabbits has a birth rate of 0.05 and a death rate of 0.02. If the initial population is 100, what is the population after 5 generations?
A. 150
B. 120
Correct C. 180
D. 200

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
A diagram shows a plant with 5 leaves. If 2 leaves are removed, what is the new number of leaves?
Correct A. 3
B. 5
C. 7
D. 9

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
In the context of tissue organization, what is the primary function of the basement membrane?
A. To provide structural support to the epithelial cells
Correct B. To facilitate the exchange of nutrients and waste products between the epithelial cells and the underlying connective tissue
C. To act as a barrier against pathogens and toxins
D. To regulate the movement of ions and water across the epithelial cells

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A 25-year-old woman presents with a 2-year history of progressive weakness and fatigue. Her hemoglobin level is 8.5 g/dL, and her mean corpuscular volume (MCV) is 60 fL. Which of the following is the most likely diagnosis?
Correct A. Iron deficiency anemia
B. Thalassemia major
C. Sickle cell disease
D. Vitamin B12 deficiency anemia

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
A 35-year-old man presents with a 1-year history of recurrent episodes of bronchospasm and wheezing. His peak expiratory flow rate (PEFR) is 200 L/min. Which of the following is the most likely diagnosis?
Correct A. Asthma
B. Chronic obstructive pulmonary disease (COPD)
C. Cystic fibrosis
D. Bronchiectasis

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
A 28-year-old woman presents with a 3-year history of recurrent episodes of pelvic pain and infertility. Her menstrual cycle is irregular, and her pelvic examination reveals a mass in the left adnexa. Which of the following is the most likely diagnosis?
A. Ectopic pregnancy
B. Ovarian cyst
Correct C. Endometriosis
D. Pelvic inflammatory disease (PID)

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
A 40-year-old man presents with a 5-year history of progressive weakness and fatigue. His hemoglobin level is 10.5 g/dL, and his mean corpuscular volume (MCV) is 80 fL. Which of the following is the most likely diagnosis?
A. Iron deficiency anemia
B. Thalassemia major
C. Sickle cell disease
Correct D. Vitamin B12 deficiency anemia

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
In a diploid cell, what is the ratio of autosomal chromosomes to sex chromosomes during meiosis?
A. 1:1
Correct B. 2:1
C. 1:2
D. 2:2

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A plant with the genotype 'Rr' is crossed with a plant of genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?
A. 0%
Correct B. 25%
C. 50%
D. 100%

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
The diagram below shows the structure of a mitochondrion. What is the function of the cristae?
A. Protein synthesis
B. Cell signaling
Correct C. Electron transport
D. DNA replication

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
A person with a blood type of 'AB' is married to a person with a blood type of 'O'. What is the genotype of their offspring?
A. IAi
B. IO
C. IA
Correct D. IOi

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
The diagram below shows the structure of a plant cell. What is the function of the vacuole?
A. Protein synthesis
B. Cell signaling
Correct C. Storage of water and nutrients
D. DNA replication

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