Practice post utme uniport biology 2019 Past Questions

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 frequency of the homozygous dominant genotype 'AA'?

Correct A. 0.64

B. 0.36

C. 0.16

D. 0.04

Correct Answer: A

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Question 2

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'?

Correct A. 0.25

B. 0.5

C. 0.75

D. 1.0

Correct Answer: A

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Question 3

A diagram of the human brain is shown below.

Correct A. The cerebral cortex

B. The cerebellum

C. The brainstem

D. The spinal cord

Correct Answer: A

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Question 4

A diagram of the human kidney is shown below.

Correct A. The nephrons

B. The renal pelvis

C. The calyces

D. The ureters

Correct Answer: A

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Question 5

A diagram of the human eye is shown below.

A. The cornea

B. The lens

Correct C. The retina

D. The optic nerve

Correct Answer: C

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Question 6

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

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Question 7

A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?

A. 0.25

Correct B. 0.5

C. 0.75

D. 0.9

Correct Answer: B

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Question 8

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

A. To focus light onto the retina

B. To re\fract light entering the eye

Correct C. To detect light and color

D. To regulate the amount of light entering the eye

Correct Answer: C

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Question 9

A diagram of the human respiratory system is shown below. What is the function of the part labeled 'D'?

A. To conduct air from the trachea to the bronchi

B. To regulate the amount of air entering the lungs

C. To exchange oxygen and carbon dioxide

Correct D. To contract and relax to facilitate breathing

Correct Answer: D

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Question 10

A diagram of the human circulatory system is shown below. What is the function of the part labeled 'E'?

A. To pump blood from the heart to the arteries

B. To conduct blood from the arteries to the capillaries

C. To exchange oxygen and carbon dioxide

Correct D. To return deoxygenated blood to the heart

Correct Answer: D

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Question 11

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'?

A. 0.36

Correct B. 0.64

C. 0.16

D. 0.04

Correct Answer: B

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Question 12

A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'rr'?

A. 0.25

Correct B. 0.5

C. 0.75

D. 0.9

Correct Answer: B

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Question 13

A person with normal vision has a re\fractive error of -2.00 D. What is the focal length of the corrective lens needed to correct this error?

A. +25.0 cm

Correct B. +50.0 cm

C. +75.0 cm

D. +100.0 cm

Correct Answer: B

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Question 14

A solution of glu\cose has a concentration of 0.2 M. If 50 mL of this solution is diluted to a total volume of 100 mL, what is the new concentration of glu\cose?

A. 0.05 M

Correct B. 0.1 M

C. 0.15 M

D. 0.2 M

Correct Answer: B

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Question 15

A person is s\tanding 10 m away from a mirror. If the mirror is a concave mirror with a focal length of -0.5 m, what is the image dis\tance?

A. -5.0 m

B. -10.0 m

C. -15.0 m

Correct D. -20.0 m

Correct Answer: D

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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

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Question 17

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'?

Correct A. 0.25

B. 0.5

C. 0.75

D. 0.9

Correct Answer: A

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Question 18

A person has a blood type of AB. If the person's genotype is 'AB', what is the probability that their offspring will have the blood type 'B'?

A. 0.25

Correct B. 0.5

C. 0.75

D. 0.9

Correct Answer: B

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Question 19

A population of bacteria is growing exponentially. If the initial population is 100 and the population doubles every 2 hours, what is the population after 6 hours?

A. 1600

B. 3200

Correct C. 6400

D. 12800

Correct Answer: C

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Question 20

A person has a disease that is caused by a virus. If the person's immune system is unable to fight off the virus, what is the most likely outcome?

A. The person will recover

Correct B. The person will die

C. The person will develop a chronic illness

D. The person will develop a rare disease

Correct Answer: B

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Question 21

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 'BB'?

Correct A. 0.36

B. 0.64

C. 0.72

D. 0.84

Correct Answer: A

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Question 22

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'?

Correct A. 0.25

B. 0.5

C. 0.75

D. 0.9

Correct Answer: A

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Question 23

A diagram of a plant's xylem and phloem tissues is shown below. What is the function of the xylem tissue?

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

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

C. Support and storage of plant cells

D. Protection of plant cells from pathogens

Correct Answer: A

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Question 24

A diagram of a human eye is shown below. What is the function of the retina?

Correct A. Detection of light and transmission of signals to the brain

B. Production of tears and lubrication of the eye

C. Regulation of the amount of light entering the eye

D. Protection of the eye from pathogens

Correct Answer: A

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Question 25

A diagram of a human circulatory system is shown below. What is the function of the heart?

Correct A. Pumping of blood throughout the body

B. Regulation of body temperature

C. Production of red blood cells

D. Filtering of waste products from the blood

Correct Answer: A

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POST UTME UNIPORT 2019 Biology | Objective

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