Practice Post UTME RSU biology 2018 Past Questions

Question 1

In a population of 1000 individuals, 60% are heterozygous for the ABO blood group system. If 20% of the population is type A, 40% is type B, and 40% is type AB, what is the genotype of the individual who is type AB?

A. IAi

B. IBi

C. IAIB

Correct D. IAiB

Correct Answer: D

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

Question 2

A plant has a root system that consists of a taproot and a lateral root system. The taproot is 10 cm long and the lateral roots are 5 cm long. If the plant is placed in a solution with a concentration of 0.1 M sucrose, what is the rate of sucrose uptake by the taproot?

A. 0.5 mmol/s

Correct B. 1.0 mmol/s

C. 1.5 mmol/s

D. 2.0 mmol/s

Correct Answer: B

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

Question 3

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

Correct A. Aorta

B. Pulmonary artery

C. Femoral vein

D. Coronary artery

Correct Answer: A

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

Question 4

A plant has a root system that consists of a taproot and a lateral root system. The taproot is 10 cm long and the lateral roots are 5 cm long. If the plant is placed in a solution with a concentration of 0.1 M sucrose, what is the rate of sucrose uptake by the lateral roots?

A. 0.5 mmol/s

B. 1.0 mmol/s

Correct C. 1.5 mmol/s

D. 2.0 mmol/s

Correct Answer: C

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

Question 5

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

A. Esophagus

Correct B. Stomach

C. Duodenum

D. Jejunum

Correct Answer: B

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

Question 6

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

Correct A. 0.8

B. 0.6

C. 0.4

D. 0.2

Correct Answer: A

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

Question 7

A 2.5 L solution of 0.1 M NaCl is diluted to 5 L. What is the new concentration of NaCl?

Correct A. 0.02 M

B. 0.04 M

C. 0.05 M

D. 0.1 M

Correct Answer: A

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

Question 8

A patient has a fever of 38.5°C. If the normal body temperature is 37°C, what is the percentage increase in body temperature?

A. 2%

Correct B. 4%

C. 6%

D. 8%

Correct Answer: B

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

Question 9

In a random sample of 1000 people, 250 are left-handed. What is the probability of randomly selecting a left-handed person?

Correct A. 0.25

B. 0.3

C. 0.35

D. 0.4

Correct Answer: A

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

Question 10

A 50 mL solution of 0.5 M HCl is added to 100 mL of 0.2 M NaOH. What is the concentration of the resulting solution?

A. 0.1 M

Correct B. 0.2 M

C. 0.3 M

D. 0.4 M

Correct Answer: B

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

Question 11

In the context of excretion and osmoregulation, what is the primary function of the kidneys in maintaining homeostasis?

A. To regulate blood pH levels

Correct B. To remove waste products from the body

C. To maintain water balance in the body

D. To regulate electrolyte balance

Correct Answer: B

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

Question 12

A diagram of the human circulatory system is shown below. Which of the following is the correct sequence of blood flow from the heart to the lungs?

Correct A. Right atrium → pulmonary artery → lungs → pulmonary vein → left atrium

B. Right atrium → pulmonary vein → lungs → pulmonary artery → left atrium

C. Left atrium → pulmonary vein → lungs → pulmonary artery → right atrium

D. Left atrium → pulmonary artery → lungs → pulmonary vein → right atrium

Correct Answer: A

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

Question 13

In the context of evolutionary theories, what is the primary mechanism driving the process of speciation?

Correct A. Natural selection

B. Genetic drift

C. Gene flow

D. Mutation

Correct Answer: A

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

Question 14

A diagram of the human nervous system is shown below. Which of the following is the correct sequence of nerve impulses from the sensory receptor to the brain?

Correct A. Sensory receptor → axon → synapse → d\endrite → neuron

B. Sensory receptor → synapse → axon → d\endrite → neuron

C. Sensory receptor → d\endrite → synapse → axon → neuron

D. Sensory receptor → neuron → axon → synapse → d\endrite

Correct Answer: A

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

Question 15

In the context of excretion and osmoregulation, what is the primary function of the kidneys in regulating electrolyte balance?

A. To remove excess electrolytes from the body

B. To regulate the concentration of electrolytes in the blood

Correct C. To maintain the balance of electrolytes in the body

D. To eliminate excess water from the body

Correct Answer: C

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

Question 16

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 frequency of the homozygous dominant genotype 'AA'?

Correct A. 0.36

B. 0.64

C. 0.72

D. 0.84

Correct Answer: A

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

Question 17

A 2.0-mL sample of a 0.1 M solution of glu\cose (C6H12O6) is diluted to a total volume of 10.0 mL. What is the concentration of the glu\cose solution after dilution?

A. 0.01 M

Correct B. 0.02 M

C. 0.05 M

D. 0.1 M

Correct Answer: B

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

Question 18

A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?

A. 1/2

Correct B. 1/4

C. 3/4

D. 1/8

Correct Answer: B

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

Question 19

A 5.0-g sample of a compound with the formula C4H10 is burned in a combustion reaction. If 11.2 L of CO2 gas is produced at STP, what is the empirical formula of the compound?

Correct A. C2H5

B. C3H7

C. C4H8

D. C5H10

Correct Answer: A

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

Question 20

A solution of NaOH is added to a solution of HCl. If 25.0 mL of 0.1 M NaOH is added to 25.0 mL of 0.1 M HCl, what is the pH of the resulting solution?

A. 6.0

Correct B. 7.0

C. 8.0

D. 9.0

Correct Answer: B

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

Question 21

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 frequency of the homozygous dominant genotype 'AA'?

Correct A. 0.64

B. 0.36

C. 0.16

D. 0.84

Correct Answer: A

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

Question 22

A researcher is studying the effect of pH on the growth of E. coli. The graph below shows the growth of E. coli at different pH levels. What is the pH level at which the growth of E. coli is maximum?

A. 6.5

Correct B. 7.5

C. 8.5

D. 9.5

Correct Answer: B

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

Question 23

A plant has a genotype of 'Rr' for the flower color gene. What is the probability that the plant will produce a flower with the dominant trait?

A. 0.5

Correct B. 0.75

C. 0.25

D. 0.33

Correct Answer: B

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

Question 24

A population of rabbits is growing at a rate of 20% per year. If the population is currently 1000, what will be the population after 5 years?

A. 1638

B. 1849

C. 2060

Correct D. 2271

Correct Answer: D

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

Question 25

A researcher is studying the effect of temperature on the growth of bacteria. The graph below shows the growth of bacteria at different temperatures. What is the temperature at which the growth of bacteria is maximum?

A. 30°C

Correct B. 40°C

C. 50°C

D. 60°C

Correct Answer: B

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

POST UTME RSU 2018 Biology | Objective

Master the Exam!

Help others prepare! Share this practice hub: