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POST UTME WELLSPRING UNIVERSITY 2021 Biology | Objective

Are you preparing for POST UTME WELLSPRING UNIVERSITY 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 a eukaryotic cell, what is the primary function of the Golgi apparatus?

A. Protein synthesis

B. Cell signaling

Correct C. Modification and transport of proteins and lipids

D. Cell division

Correct Answer: C

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Question 2

What is the process by which plants convert light energy into chemical energy?

A. Respiration

Correct B. Photosynthesis

C. Decomposition

D. Fermentation

Correct Answer: B

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Question 3

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

A. Cell wall

B. Cytoplasm

Correct C. Nucleus

D. Mitochondria

Correct Answer: C

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Question 4

What is the term for the movement of molecules from an area of high concentration to an area of low concentration?

A. Osmosis

Correct B. Diffusion

C. Active transport

D. Passive transport

Correct Answer: B

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Question 5

A diagram of a human eye is shown below. What is the function of the part labeled 'B'?

A. Cornea

Correct B. Iris

C. Lens

D. Retina

Correct Answer: B

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Question 6

In a population of 1000 individuals, 70% are heterozygous for the gene controlling the production of a certain enzyme. If 20% of the population is homozygous recessive, what is the frequency of the recessive allele?

Correct A. 0.15

B. 0.20

C. 0.25

D. 0.30

Correct Answer: A

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Question 7

A plant with a mutation in the gene controlling flower color is crossed with a plant with normal flower color. The offspring have a 1:1 ratio of red to white flowers. What is the genotype of the mutated plant?

Correct A. Rr

B. RR

C. rr

D. Rr

Correct Answer: A

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Question 8

A 2.0 M solution of NaCl is diluted to 0.5 M. What is the new volume of the solution?

A. 1000 mL

Correct B. 500 mL

C. 2000 mL

D. 2500 mL

Correct Answer: B

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Question 9

A 50-g sample of a subs\tance is dissolved in 100 mL of water. What is the molarity of the solution?

Correct A. 0.5 M

B. 1.0 M

C. 2.0 M

D. 5.0 M

Correct Answer: A

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Question 10

A diagram of a plant cell is shown below. Identify the part labeled A.

Correct A. Mitochondria

B. Chloroplast

C. Vacuole

D. Nucleus

Correct Answer: A

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Question 11

In the context of gas exchange, what is the primary function of the alveolar-capillary membrane?

A. To regulate the pH of the blood

Correct B. To facilitate the diffusion of oxygen and carbon dioxide

C. To produce surfac\tant for lung expansion

D. To filter out pathogens from the blood

Correct Answer: B

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Question 12

A 20-year-old male presents with a 2-week history of progressive shortness of breath. Physical examination reveals a loud S3 gallop and a holosystolic murmur. Echocardiography shows a dilated left ventricle with a reduced ejection \fraction. What is the most likely diagnosis?

A. Hypertrophic cardiomyopathy

Correct B. Dilated cardiomyopathy

C. Coronary artery disease

D. Mitral valve prolapse

Correct Answer: B

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Question 13

A 35-year-old female presents with a 6-month history of fatigue, weight loss, and abdominal pain. Laboratory tests reveal a hemoglobin level of 8 g/dL and a mean corpuscular volume (MCV) of 80 fL. What is the most likely diagnosis?

Correct A. Iron deficiency anemia

B. Vitamin B12 deficiency anemia

C. Folate deficiency anemia

D. Sickle cell anemia

Correct Answer: A

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Question 14

A 25-year-old male presents with a 3-day history of fever, headache, and stiff neck. Lumbar puncture reveals a cerebrospinal fluid (CSF) glu\cose level of 20 mg/dL and a protein level of 100 mg/dL. What is the most likely diagnosis?

Correct A. Meningitis

B. Encephalitis

C. Subarachnoid hemorrhage

D. Brain tumor

Correct Answer: A

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Question 15

A 40-year-old female presents with a 2-year history of progressive dysphagia and weight loss. Esophagogastroduodenoscopy (EGD) reveals a stricture at the level of the lower esophagus. What is the most likely diagnosis?

Correct A. Esophageal cancer

B. Gastroesophageal reflux disease (GERD)

C. Esophageal stricture

D. Achalasia

Correct Answer: A

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Question 16

In a community of organisms, the presence of a specific species can be described as a(n) _______________________.

Correct A. keystone species

B. foundation species

C. umbrella species

D. indicator species

Correct Answer: A

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Question 17

The process of photosynthesis in plants involves the conversion of light energy into chemical energy, resulting in the production of _______________________ and oxygen.

A. glu\cose and water

Correct B. glu\cose and oxygen

C. starch and carbon dioxide

D. sucrose and nitrogen

Correct Answer: B

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Question 18

In the human body, the nervous system and the \endocrine system work together to regulate various bodily functions, including _______________________ and growth.

A. heart rate and blood pressure

B. hunger and thirst

Correct C. growth and development

D. sleep and wakefulness

Correct Answer: C

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Question 19

The process of digestion in the human body involves the breakdown of food into smaller molecules, which are then absorbed into the bloodstream and transported to the liver for _______________________.

A. storage and distribution

Correct B. metabolism and utilization

C. excretion and elimination

D. synthesis and production

Correct Answer: B

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Question 20

In a forest e\cosystem, the presence of a specific species can have a cascading effect on the entire community, leading to changes in the population dynamics of other species, including _______________________ and predators.

Correct A. prey and predators

B. herbivores and carnivores

C. decomposers and scavengers

D. mutualists and commensals

Correct Answer: A

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Question 21

In the context of cellular respiration, what is the primary function of the electron transport chain?

A. To generate ATP through substrate-level phosphorylation

Correct B. To pump protons across the mitochondrial inner membrane

C. To reduce NADH and FADH2 to NAD+ and FAD

D. To produce water and carbon dioxide as byproducts

Correct Answer: B

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Question 22

A plant cell is placed in a solution with a high concentration of sucrose. What is the expected outcome?

A. The plant cell will shrink due to water loss

Correct B. The plant cell will swell due to water uptake

C. The plant cell will remain unchanged

D. The plant cell will burst due to osmotic pressure

Correct Answer: B

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Question 23

A diagram of the human respiratory system is shown below. What is the function of the alveoli?

Correct A. To exchange oxygen and carbon dioxide with the environment

B. To filter dust and other particles from the air

C. To produce mucus to trap pathogens

D. To regulate body temperature

Correct Answer: A

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Question 24

A diagram of the human circulatory system is shown below. What is the function of the coronary arteries?

A. To supply oxygen to the brain and other vital organs

B. To regulate blood pressure

Correct C. To supply oxygen to the heart muscle itself

D. To filter waste products from the blood

Correct Answer: C

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Question 25

A diagram of the human digestive system is shown below. What is the function of the pancreas?

A. To produce bile to aid in fat digestion

B. To produce enzymes to aid in protein digestion

Correct C. To produce hormones to regulate blood sugar levels

D. To produce mucus to trap pathogens

Correct Answer: C

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