Practice post utme noun biology 2022 Past Questions

Question 1

In a eukaryotic cell, what is the primary function of the Golgi apparatus?

A. Protein synthesis

B. Cell signaling

Correct C. Protein modification and transport

D. Cell division

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 2

A plant root system consists of a taproot and lateral roots. What is the primary function of the taproot?

Correct A. Water and nutrient uptake

B. Support and anchorage

C. Storage of food and water

D. Photosynthesis

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 3

In a sexual reproduction cycle, what is the term for the fusion of male and female gametes?

A. Meiosis

B. Mitosis

C. Fertilization

Correct D. Syngamy

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 4

A diagram of a human kidney is shown below. What is the primary function of the renal corpuscle?

Correct A. Filtering waste and excess fluids

B. Regulating blood pressure

C. Producing hormones

D. Storing waste and excess fluids

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 5

A diagram of a human heart is shown below. What is the primary function of the atrioventricular (AV) node?

A. Regulating heart rate

Correct B. Conducting electrical impulses

C. Pumping blood

D. Filtering blood

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 6

In the context of hormonal coordination, what is the primary function of the hypothalamus?

A. Regulation of body temperature

B. Stimulation of appetite

Correct C. Regulation of hormone secretion

D. Control of sleep-wake cycle

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 7

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

A. Trachea

Correct B. Lungs

C. Diaphragm

D. Bronchi

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 8

A cell is placed in a solution with a high concentration of glu\cose. What is the expected outcome?

A. The cell will shrink due to water loss

Correct B. The cell will swell due to water gain

C. The cell will remain unchanged

D. The cell will burst due to osmotic pressure

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 9

A diagram of the human digestive system is shown below. Which part of the diagram is responsible for the breakdown of proteins?

A. Mouth

Correct B. Stomach

C. Small intestine

D. Large intestine

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 10

A diagram of the human circulatory system is shown below. Which part of the diagram is responsible for the regulation of blood pressure?

Correct A. Heart

B. Arteries

C. Veins

D. Capillaries

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 11

In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?

Correct A. 0.25

B. 0.5

C. 0.75

D. 0.9

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 12

A researcher wants to study the effect of temperature on the growth rate of E. coli. She sets up an experiment with three different temperatures: 25°C, 30°C, and 35°C. The growth rate of E. coli is measured at each temperature. Which of the following is the most likely explanation for the observed data?

A. The growth rate of E. coli increases with increa\sing temperature.

B. The growth rate of E. coli decreases with increa\sing temperature.

C. The growth rate of E. coli remains cons\tant at all temperatures.

Correct D. The growth rate of E. coli has a maximum at a certain temperature.

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 13

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

Correct A. 386.16

B. 400

C. 500

D. 600

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 14

A researcher wants to study the effect of pH on the activity of an enzyme. She sets up an experiment with three different pH levels: 5, 7, and 9. The activity of the enzyme is measured at each pH level. Which of the following is the most likely explanation for the observed data?

A. The activity of the enzyme increases with increa\sing pH.

B. The activity of the enzyme decreases with increa\sing pH.

C. The activity of the enzyme remains cons\tant at all pH levels.

Correct D. The activity of the enzyme has a maximum at a certain pH level.

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 15

A population of bacteria is growing \logistically. If the carrying capacity is 1000 and the growth rate is 0.5 per year, what is the population size after 10 years?

Correct A. 999.99

B. 1000

C. 1001

D. 1002

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 16

A researcher wants to study the effect of temperature on the growth rate of a plant. She sets up an experiment with three different temperatures: 20°C, 25°C, and 30°C. The growth rate of the plant is measured at each temperature. Which of the following is the most likely explanation for the observed data?

A. The growth rate of the plant increases with increa\sing temperature.

B. The growth rate of the plant decreases with increa\sing temperature.

C. The growth rate of the plant remains cons\tant at all temperatures.

D. The growth rate of the plant has a maximum at a certain temperature.

Correct Answer: VIEW ANSWER

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 17

In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?

Correct A. 0.4

B. 0.2

C. 0.6

D. 0.8

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 18

A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of gas is added to the flask, what is the new pressure?

A. 2.5 atm

Correct B. 3.0 atm

C. 4.0 atm

D. 5.0 atm

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 19

A plant has a root system with a total surface area of 100 cm². If the root system is 50% covered with mycorrhizal fungi, what is the surface area of the root system covered with mycorrhizal fungi?

A. 50 cm²

Correct B. 75 cm²

C. 100 cm²

D. 125 cm²

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 20

A 5.0 L flask contains 2.0 mol of an ideal gas at 37°C. If the gas is compressed to 2.5 L, what is the new pressure?

A. 2.0 atm

B. 3.0 atm

Correct C. 4.0 atm

D. 5.0 atm

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 21

A 10.0 L flask contains 4.0 mol of an ideal gas at 47°C. If the gas is expanded to 15.0 L, what is the new pressure?

A. 1.0 atm

Correct B. 2.0 atm

C. 3.0 atm

D. 4.0 atm

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 22

The process of gas exchange in the human respiratory system involves the diffusion of oxygen and carbon dioxide across the alveolar-capillary membrane. Which of the following best describes the direction of diffusion for oxygen and carbon dioxide?

Correct A. Oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli.

B. Oxygen diffuses from the blood into the alveoli, while carbon dioxide diffuses from the alveoli into the blood.

C. Oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the tissues.

D. Oxygen diffuses from the blood into the tissues, while carbon dioxide diffuses from the tissues into the alveoli.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 23

The diagram below shows the structure of a plant cell. Which of the following organelles is responsible for protein synthesis?

A. Nucleus

B. Mitochondria

Correct C. Ribosomes

D. Endoplasmic reticulum

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 24

The Hardy-Weinberg principle states that the frequencies of alleles in a population will remain cons\tant from generation to generation in the absence of certain factors. Which of the following factors can cause a change in allele frequencies?

A. Mutation

B. Genetic drift

C. Gene flow

Correct D. All of the above

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Question 25

The diagram below shows a cross-section of a human eye. Which of the following structures is responsible for detecting light?

A. Cornea

B. Iris

Correct C. Retina

D. Lens

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

POST UTME NOUN 2022 Biology | Objective

Master the Exam!

Help others prepare! Share this practice hub: