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POST UTME KSU 2018 Biology | Objective

Are you preparing for POST UTME KSU 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

A 2-year-old child is diagnosed with a rare genetic disorder that affects the production of a crucial enzyme in the citric acid cycle. Which of the following enzymes is most likely affected?

A. Isocitrate dehydrogenase

Correct B. Alpha-ketoglutarate dehydrogenase

C. Succinyl-CoA synthetase

D. Malate dehydrogenase

Correct Answer: B

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Question 2

A diagram of the human respiratory system is shown below. Which of the following structures is responsible for the exchange of oxygen and carbon dioxide?

A. Trachea

Correct B. Lungs

C. Diaphragm

D. Bronchi

Correct Answer: B

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Question 3

A cell is placed in a solution with a pH of 7.5. What is the concentration of hydrogen ions in the solution?

Correct A. 1.0 x 10^\( -7.5 \) M

B. 1.0 x 10^\( -7.0 \) M

C. 1.0 x 10^\( -6.5 \) M

D. 1.0 x 10^\( -6.0 \) M

Correct Answer: A

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Question 4

A diagram of the human skeletal system is shown below. Which of the following bones is responsible for the formation of the shoulder joint?

A. Scapula

B. Humerus

Correct C. Clavicle

D. Sternum

Correct Answer: C

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Question 5

A 30-year-old woman is diagnosed with a rare genetic disorder that affects the production of a crucial enzyme in the glycolytic pathway. Which of the following enzymes is most likely affected?

A. Hexokinase

Correct B. Phosphofructokinase

C. Pyruvate kinase

D. Glyceraldehyde-3-phosphate dehydrogenase

Correct Answer: B

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Question 6

In a tropical rainforest, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?

A. Fungi

Correct B. Bacteria

C. Protozoa

D. Rotifers

Correct Answer: B

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Question 7

A plant cell is placed in a solution with a high concentration of sucrose. Which of the following processes will occur?

Correct A. Osmosis

B. Diffusion

C. Active transport

D. Passive transport

Correct Answer: A

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Question 8

A population of rabbits is growing exponentially. If the initial population is 100 and the growth rate is 20% per year, what will be the population after 5 years?

A. 1000

B. 2000

C. 4000

Correct D. 8000

Correct Answer: D

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Question 9

A diagram of a plant cell is shown below. Which of the following organelles is responsible for photosynthesis?

A. Mitochondria

Correct B. Chloroplast

C. Endoplasmic reticulum

D. Golgi apparatus

Correct Answer: B

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Question 10

A diagram of a human kidney is shown below. Which of the following structures is responsible for filtering waste products from the blood?

A. Liver

B. Spleen

Correct C. Nephron

D. Pancreas

Correct Answer: C

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Question 11

In a study on the genetic basis of antibiotic resis\tance in bacteria, researchers found that the frequency of resis\tance genes in a population of E. coli increased over time. Which of the following best explains this observation?

A. Natural selection acting on the bacteria

Correct B. Horizontal gene transfer between bacteria

C. Mutation of existing genes in the bacteria

D. Genetic drift in the population

Correct Answer: B

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Question 12

A researcher is studying the effect of pH on the activity of the enzyme lactase. Which of the following would be the best way to measure the activity of lactase at different pH levels?

Correct A. U\sing a spectrophotometer to measure the absorbance of the reaction mixture

B. U\sing a pH meter to measure the pH of the reaction mixture

C. U\sing a calorimeter to measure the heat released by the reaction

D. U\sing a chromatography column to separate the products of the reaction

Correct Answer: A

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Question 13

A patient is diagnosed with a genetic disorder that affects the production of a specific protein. Which of the following would be the best way to diagnose the disorder?

Correct A. Genetic testing to identify the mutation in the gene

B. Biochemical testing to measure the levels of the protein

C. Imaging studies to visualize the affected tissue

D. Clinical evaluation to assess the symptoms

Correct Answer: A

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Question 14

A researcher is studying the effect of exercise on the cardiovascular system. Which of the following would be the best way to measure the effect of exercise on cardiac output?

Correct A. U\sing a Doppler ultrasound to measure blood flow velocity

B. U\sing a cardiac catheter to measure cardiac output directly

C. U\sing a pulse oximeter to measure oxygen saturation

D. U\sing a blood pressure cuff to measure blood pressure

Correct Answer: A

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Question 15

A patient is diagnosed with a condition that affects the production of insulin. Which of the following would be the best way to manage the condition?

Correct A. Administering insulin via injection

B. Following a strict diet and exercise regimen

C. Taking oral medications to stimulate insulin production

D. U\sing a continuous glu\cose monitor to track blood sugar levels

Correct Answer: A

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Question 16

In the context of hormonal coordination, what is the primary function of the hypothalamus in regulating body temperature?

A. To produce heat through shivering

B. To conserve heat through vasoconstriction

C. To regulate body temperature through sweating

Correct D. To stimulate the release of hormones that regulate body temperature

Correct Answer: D

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Question 17

A patient with a malfunctioning kidney experiences a buildup of urea in the blood. What is the primary mechanism by which the body attempts to eliminate this waste product?

A. Through the process of diffusion

B. Through the process of osmoregulation

Correct C. Through the process of excretion

D. Through the process of filtration

Correct Answer: C

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Question 18

A diagram of the human eye is shown below. Identify the part labeled A.

Correct A. The cornea

B. The iris

C. The retina

D. The lens

Correct Answer: A

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Question 19

A diagram of the human digestive system is shown below. Identify the part labeled B.

A. The esophagus

Correct B. The stomach

C. The small intestine

D. The large intestine

Correct Answer: B

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Question 20

A diagram of the human circulatory system is shown below. Identify the part labeled C.

A. The lungs

B. The liver

Correct C. The heart

D. The kidneys

Correct Answer: C

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Question 21

A diagram of the human respiratory system is shown below. Identify the part labeled D.

A. The trachea

B. The bronchi

C. The diaphragm

Correct D. The lungs

Correct Answer: D

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Question 22

A diagram of the human excretory system is shown below. Identify the part labeled E.

A. The skin

B. The liver

C. The pancreas

Correct D. The kidneys

Correct Answer: D

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Question 23

A diagram of the human nervous system is shown below. Identify the part labeled F.

A. The spinal cord

B. The cerebrum

C. The cerebellum

Correct D. The brain

Correct Answer: D

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Question 24

A diagram of the human circulatory system is shown below. Identify the part labeled G.

Question 25

In the xylem, what is the primary function of the tracheids?

Correct A. Transport of water and minerals from the roots to the leaves

B. Transport of sugars and amino acids from the leaves to the roots

C. Storage of starch and proteins in the leaves

D. Regulation of stomatal aperture

Correct Answer: A

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