Exam Body

Year

Subject

Paper Type

POST UTME UNIBEN 2023 Biology | Objective

Are you preparing for POST UTME UNIBEN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

In a photosynthetic pathway, which of the following is the primary acceptor of electrons in the light-dep\endent reactions?

A. Plastocyanin

B. Ferredoxin

Correct C. Pheophytin

D. ATP

Correct Answer: C

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Question 2

A patient is diagnosed with a bacterial infection. The bacteria are Gram-positive and have a thick peptidoglycan layer. Which of the following antibiotics is most likely to be effective against this infection?

Correct A. Penicillin

B. Ciprofloxacin

C. Vancomycin

D. Tetracycline

Correct Answer: A

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Question 3

In the human circulatory system, which of the following vessels is responsible for the transport of oxygenated blood from the lungs to the heart?

A. Pulmonary Vein

Correct B. Pulmonary Artery

C. Aorta

D. Superior Vena Cava

Correct Answer: B

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Question 4

A population of rabbits is introduced to a new island. Over time, the population grows exponentially. Which of the following mathematical models best describes this growth?

Correct A. ( P(t) = P_0 e^{kt} )

B. ( P(t) = P_0 + kt )

C. ( P(t) = P_0 - kt )

D. ( P(t) = P_0 \sqrt{t} )

Correct Answer: A

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Question 5

In the human digestive system, which of the following enzymes is responsible for the breakdown of proteins into smaller peptides?

A. Pep\sin

Correct B. Tryp\sin

C. Lactase

D. Amylase

Correct Answer: B

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Question 6

In a photosynthetic pathway, which enzyme catalyzes the conversion of CO2 to a 3-carbon molecule?

Correct A. RuBisCO

B. PEPC

C. Phosphoglycerate kinase

D. Phosphoglycerate mutase

Correct Answer: A

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Question 7

A 25-year-old male patient presents with a 2-year history of progressive weakness and fatigue. His serum creatinine level is elevated at 3.5 mg/dL. Which of the following is the most likely diagnosis?

Correct A. Chronic kidney disease

B. Chronic liver disease

C. Diabetes mellitus

D. Hypertension

Correct Answer: A

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Question 8

A 30-year-old female patient undergoes a surgical procedure to remove a tumor from her left breast. During the procedure, the surgeon accidentally damages the axillary lymph nodes. Which of the following is the most likely complication?

A. Infection

Correct B. Lymphedema

C. Nerve damage

D. Wound dehiscence

Correct Answer: B

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Question 9

A 40-year-old male patient presents with a 5-year history of progressive shortness of breath and fatigue. His chest X-ray shows a large mass in the right lung. Which of the following is the most likely diagnosis?

Correct A. Lung cancer

B. Pulmonary embolism

C. Pneumonia

D. Tuberculosis

Correct Answer: A

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Question 10

A 20-year-old female patient presents with a 2-year history of progressive memory loss and confusion. Her MRI scan shows a large mass in the temporal lobe. Which of the following is the most likely diagnosis?

A. Alzheimer's disease

Correct B. Brain tumor

C. Epilepsy

D. Schizophrenia

Correct Answer: B

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Question 11

In a eukaryotic cell, the process of cell division that results in the production of four daughter cells, each with the same number and kind of chromosomes as the parent cell, is called

Correct A. Mitosis

B. Meiosis

C. Binary Fission

D. Endosymbiosis

Correct Answer: A

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Question 12

The process by which plants transport water and minerals from the roots to the leaves is called

A. Transpiration

Correct B. Xylem Transport

C. Phloem Transport

D. Osmosis

Correct Answer: B

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Question 13

The sense organ responsible for detecting changes in light intensity is called

Correct A. Eye

B. Ear

C. Nose

D. Tongue

Correct Answer: A

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Question 14

The process by which an organism grows and develops from a \single cell is called

A. Mitosis

B. Meiosis

Correct C. Binary Fission

D. Endosymbiosis

Correct Answer: C

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Question 15

The system responsible for removing waste products from the body is called

A. Nervous System

B. Circulatory System

C. Respiratory System

Correct D. Excretory System

Correct Answer: D

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Question 16

In a closed e\cosystem, what is the primary mechanism by which energy is transferred from one trophic level to the next?

Correct A. Photosynthesis

B. Decomposition

C. Herbivory

D. Detritivory

Correct Answer: A

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Question 17

A patient is diagnosed with a genetic disorder that affects the production of a specific enzyme. Which of the following types of mutations is most likely responsible for this condition?

Correct A. Point mutation

B. Frameshift mutation

C. Deletion mutation

D. Insertion mutation

Correct Answer: A

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Question 18

In a population of rabbits, the average lifespan is 2 years. If the population grows exponentially, what is the carrying capacity of the environment?

A. 100

B. 500

C. 1000

Correct D. 2000

Correct Answer: D

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Question 19

A researcher is studying the effects of pollution on a freshwater e\cosystem. Which of the following types of pollution is most likely to have a negative impact on the e\cosystem?

A. Point source pollution

B. Non-point source pollution

C. Thermal pollution

Correct D. Chemical pollution

Correct Answer: D

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Question 20

A patient is diagnosed with a disease caused by a virus that infects the liver. Which of the following types of viruses is most likely responsible for this condition?

A. DNA virus

Correct B. RNA virus

C. Retrovirus

D. Parvovirus

Correct Answer: B

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Question 21

The process of natural selection can be described as a mechanism of evolution that favors the survival and reproduction of individuals with traits that are better suited to their environment. Which of the following is a key component of this process?

A. Genetic drift

B. Mutation

C. Gene flow

Correct D. Variation in fitness

Correct Answer: D

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Question 22

In the context of respiration, what is the primary function of the mitochondria?

Correct A. To synthesize ATP from glu\cose

B. To break down glu\cose into pyruvate

C. To transport oxygen into the cell

D. To remove waste products from the cell

Correct Answer: A

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Question 23

The sense organ responsible for detecting changes in sound waves is the?

Correct A. Ear

B. Eye

C. Nose

D. Tongue

Correct Answer: A

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Question 24

The classification of living things is based on the following hierarchy, in order from most general to most specific?

Correct A. Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

B. Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain

C. Kingdom, Phylum, Class, Order, Family, Genus, Species, Domain

D. Domain, Species, Genus, Family, Order, Class, Phylum, Kingdom

Correct Answer: A

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Question 25

The e\cosystem that is characterized by a large amount of rainfall and a diverse array of plant and animal species is the?

A. Desert

Correct B. Rainforest

C. Grassland

D. Tundra

Correct Answer: B

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