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POST UTME IMS U 2022 Biology | Objective

Are you preparing for POST UTME IMS U exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2022 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1

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 expected frequency of the homozygous dominant genotype 'AA'?

Correct A. 0.16

B. 0.36

C. 0.64

D. 0.84

Correct Answer: A

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Question 2

A diagram of the human kidney is shown below. Which part of the kidney is responsible for the reabsorption of glu\cose?

Correct A. Proximal Convoluted Tubule

B. Distal Convoluted Tubule

C. Loop of Henle

D. Collecting Duct

Correct Answer: A

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Question 3

A cell is placed in a solution with a concentration of 0.1 M glu\cose. If the cell is permeable to glu\cose, what is the direction of net glu\cose movement?

A. Into the cell

Correct B. Out of the cell

C. No net movement

D. Dep\ends on the cell membrane

Correct Answer: B

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Question 4

A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.05 per hour, what is the population size after 5 hours?

A. 500

B. 1000

C. 2000

Correct D. 5000

Correct Answer: D

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Question 5

A diagram of the human eye is shown below. Which part of the eye is responsible for adjusting the size of the pupil?

A. Cornea

Correct B. Iris

C. Lens

D. Retina

Correct Answer: B

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Question 6

In a population of 1000 individuals, 200 are infected with a disease that has a 50% mortality rate. If 20% of the infected individuals are asymptomatic, what is the expected number of deaths due to the disease?

A. 80

B. 120

Correct C. 160

D. 200

Correct Answer: C

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Question 7

A 20-year-old male patient is diagnosed with a rare genetic disorder that affects the kidneys. The patient's serum creatinine level is 2.5 mg/dL, and his glomerular filtration rate (GFR) is 30 mL/min. What is the patient's estimated creatinine clearance?

A. 20

B. 30

Correct C. 40

D. 50

Correct Answer: C

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Question 8

A 35-year-old female patient is diagnosed with a type of cancer that affects the lungs. The patient's tumor is 5 cm in diameter, and her white blood cell count is 12,000/μL. What is the patient's estimated risk of metastasis?

A. 0.05

Correct B. 0.1

C. 0.15

D. 0.2

Correct Answer: B

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Question 9

A 45-year-old male patient is diagnosed with a type of cardiovascular disease that affects the heart. The patient's ejection \fraction is 40%, and his left ventricular \end-diastolic pressure is 25 mmHg. What is the patient's estimated risk of heart failure?

A. 0.1

B. 0.2

Correct C. 0.3

D. 0.4

Correct Answer: C

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Question 10

A 28-year-old female patient is diagnosed with a type of neuro\logical disorder that affects the brain. The patient's brain MRI shows a 2 cm x 3 cm lesion in the left temporal lobe. What is the patient's estimated risk of seizures?

A. 10

B. 20

Correct C. 30

D. 40

Correct Answer: C

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Question 11

In a population of 1000 individuals, the frequency of the dominant allele for a particular trait is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?

Correct A. 0.4

B. 0.3

C. 0.2

D. 0.1

Correct Answer: A

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Question 12

A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is selectively permeable and has a permeability coefficient of 1.2 x 10^-6 cm/s for sucrose, what is the rate of sucrose efflux?

Correct A. 2.4 x 10^-6 mol/cm^2/s

B. 1.2 x 10^-6 mol/cm^2/s

C. 6.0 x 10^-7 mol/cm^2/s

D. 3.0 x 10^-7 mol/cm^2/s

Correct Answer: A

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Question 13

A 50-g sample of a subs\tance is digested and the resulting CO2 is collected over water at 20°C and 1 atm. If the volume of CO2 collected is 2.5 L, what is the percentage of carbon in the original subs\tance?

Correct A. 40%

B. 30%

C. 20%

D. 10%

Correct Answer: A

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Question 14

A cell has a membrane potential of -70 mV and a resting potential of -60 mV. If the cell is stimulated and the membrane potential changes to -50 mV, what is the percentage change in the membrane potential?

Correct A. 12.5%

B. 25%

C. 37.5%

D. 50%

Correct Answer: A

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Question 15

A 2.5-g sample of a subs\tance is dissolved in 100 mL of water. If the resulting solution has a pH of 4.5, what is the concentration of H+ ions in the solution?

Correct A. 1.0 x 10^-5 M

B. 1.0 x 10^-4 M

C. 1.0 x 10^-3 M

D. 1.0 x 10^-2 M

Correct Answer: A

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Question 16

In the process of cellular respiration, what is the net result of the citric acid cycle?

Correct A. Production of ATP and NADH

B. Production of FADH2 and ATP

C. Production of ATP and FADH2

D. Production of NADH and FADH2

Correct Answer: A

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Question 17

Which of the following sense organs is responsible for detecting changes in blood pressure?

Correct A. Carotid \sinus

B. Aortic arch

C. Baroreceptors in the heart

D. Baroreceptors in the lungs

Correct Answer: A

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Question 18

What is the primary function of the enzyme lysozyme in the human body?

A. Breaking down proteins into amino acids

B. Breaking down carbohydrates into glu\cose

Correct C. Breaking down bacterial cell walls

D. Breaking down fats into fatty acids

Correct Answer: C

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Question 19

Which of the following microorganisms is responsible for cau\sing tuberculosis?

Correct A. Mycobacterium tuberculosis

B. Mycobacterium leprae

C. Mycobacterium avium

D. Mycobacterium bovis

Correct Answer: A

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Question 20

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

Correct A. Photosynthesis

B. Respiration

C. Transpiration

D. Translocation

Correct Answer: A

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Question 21

In a population of 1000 individuals, 20% are heterozygous for the ABO blood group. If 10% of the population are type A, 40% are type B, and 50% are type O, what is the probability that a randomly selected individual is type AB?

Correct A. 0.05

B. 0.1

C. 0.2

D. 0.3

Correct Answer: A

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Question 22

A plant with the genotype AaBbCcc is crossed with a plant with the genotype Aabbcc. What is the probability that the offspring will have the genotype AaBbCc?

A. 0.25

Correct B. 0.5

C. 0.75

D. 0.9

Correct Answer: B

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Question 23

A 2.0 L flask contains 1.0 M HCl at 25°C. If 1.0 g of NaOH is added to the flask, what is the concentration of HCl after the reaction is complete?

A. 0.5 M

Correct B. 1.0 M

C. 1.5 M

D. 2.0 M

Correct Answer: B

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Question 24

A 50-year-old man has a blood pressure of 180/100 mmHg. If he is prescribed a diuretic that reduces his blood pressure by 20%, what is his new blood pressure?

Correct A. 140/80 mmHg

B. 160/90 mmHg

C. 180/100 mmHg

D. 200/110 mmHg

Correct Answer: A

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Question 25

A 30-year-old woman has a body mass index (BMI) of 25. If she gains 10 kg, what is her new BMI?

A. 25

Correct B. 28

C. 30

D. 32

Correct Answer: B

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