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POST UTME UI 2018 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 2018 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

In a community of organisms, what is the term for the process by which organisms adapt to their environment through genetic changes?

Correct A. Natural Selection

B. Genetic Drift

C. Gene Flow

D. Mutation

Correct Answer: A

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Question 2

A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?

A. Cell Wall

Correct B. Chloroplast

C. Vacuole

D. Mitochondria

Correct Answer: B

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Question 3

A diagram of a simple circuit is shown below. What is the value of the current (I) in the circuit?

A. 2A

B. 4A

Correct C. 6A

D. 8A

Correct Answer: C

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Question 4

A diagram of a plant is shown below. What is the term for the process by which plants make their own food?

Correct A. Photosynthesis

B. Respiration

C. Transpiration

D. Evaporation

Correct Answer: A

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Question 5

A diagram of a simple apparatus is shown below. What is the purpose of the apparatus?

Correct A. To measure the volume of a liquid

B. To measure the mass of a solid

C. To measure the temperature of a solution

D. To measure the pH of a solution

Correct Answer: A

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Question 6

In a population of 1000 individuals, 80% are heterozygous for the gene controlling the ABO blood type. If 10% of the population is type A, and 20% is type B, what is the genotype of the individual who is type AB?

A. aa

B. bb

Correct C. AB

D. aa

Correct Answer: C

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Question 7

A 2.5 L flask contains 1.5 atm of O2 at 25°C. If 0.5 atm of O2 is released, what is the partial pressure of O2 in the flask?

Correct A. 0.5

B. 1

C. 1.5

D. 2

Correct Answer: A

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Question 8

A 50-year-old man has been experiencing symptoms of cataract for the past 5 years. His visual acuity is 20/200 in the right eye and 20/100 in the left eye. What is the most likely cause of his condition?

A. Age-related macular degeneration

B. Diabetic retinopathy

C. Glaucoma

Correct D. Cataract

Correct Answer: D

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Question 9

A 30-year-old woman has been experiencing symptoms of hypertension for the past 2 years. Her blood pressure is 160/100 mmHg. What is the most likely cause of her condition?

A. Kidney disease

B. Heart disease

C. Diabetes

Correct D. Genetic predisposition

Correct Answer: D

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Question 10

A 40-year-old man has been experiencing symptoms of angina for the past 5 years. His electrocardiogram (ECG) shows a pattern of ST-segment elevation. What is the most likely cause of his condition?

Correct A. Coronary artery disease

B. Cardiomyopathy

C. Arrhythmia

D. Pericarditis

Correct Answer: A

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Question 11

In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?

A. 2

Correct B. 4

C. 6

D. 8

Correct Answer: B

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Question 12

A 2.5 L flask contains 0.5 M HCl. If 1.0 M NaOH is added to the flask, what is the concentration of HCl after the reaction is complete?

Correct A. 0.25

B. 0.5

C. 0.75

D. 1.0

Correct Answer: A

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Question 13

A 10 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?

A. 0.1

Correct B. 0.2

C. 0.3

D. 0.4

Correct Answer: B

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Question 14

A 5 kg block is moving at a speed of 2 m/s on a frictionless surface. If a 2 kg block is attached to the first block, what is the new speed of the combined blocks?

A. 1.0

Correct B. 1.5

C. 2.0

D. 2.5

Correct Answer: B

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Question 15

A 10 kg block is moving at a speed of 2 m/s on a frictionless surface. If the block is subjected to a force of 10 N, what is the acceleration of the block?

A. 0.5

Correct B. 1.0

C. 1.5

D. 2.0

Correct Answer: B

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Question 16

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. 0.36

B. 0.64

C. 0.72

D. 0.84

Correct Answer: A

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Question 17

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'?

Correct A. 0.5

B. 0.25

C. 0.75

D. 0.33

Correct Answer: A

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Question 18

A solution containing 2.5 g of glu\cose (C6H12O6) is diluted to a final volume of 250 mL. What is the molarity of the glu\cose solution?

Correct A. 0.01 M

B. 0.05 M

C. 0.1 M

D. 0.2 M

Correct Answer: A

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Question 19

A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'tt'?

A. 0.5

Correct B. 0.25

C. 0.75

D. 0.33

Correct Answer: B

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Question 20

A solution containing 1.0 g of sodium chloride (NaCl) is diluted to a final volume of 100 mL. What is the molarity of the sodium chloride solution?

Correct A. 0.1 M

B. 0.05 M

C. 0.01 M

D. 0.2 M

Correct Answer: A

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Question 21

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'?

Correct A. 0.5

B. 0.25

C. 0.75

D. 0.33

Correct Answer: A

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Question 22

A solution containing 3.0 g of glu\cose (C6H12O6) is diluted to a final volume of 500 mL. What is the molarity of the glu\cose solution?

Correct A. 0.02 M

B. 0.01 M

C. 0.05 M

D. 0.1 M

Correct Answer: A

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Question 23

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 in a heterozygous individual?

Correct A. Incomplete dominance

B. Codominance

C. Heterosis

D. Pleiotropy

Correct Answer: A

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Question 24

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

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Question 25

A plant hormone that promotes cell elongation and cell division is:

Correct A. Auxin

B. Cytokinin

C. Ethylene

D. Abscisic acid

Correct Answer: A

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