Practice Post UTME DELSU biology 2020 Past Questions

Question 1

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

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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. 0.5

B. 0.25

C. 0.75

D. 0.33

Correct Answer: A

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Question 3

A diagram of a plant cell is shown below. Identify the part labeled 'A'.

A. Mitochondria

B. Chloroplast

Correct C. Nucleus

D. Vacuole

Correct Answer: C

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Question 4

A diagram of a simple circuit is shown below. If the circuit is connected to a power source, what will be the direction of the current flow?

Correct A. Clockwise

B. Counterclockwise

C. Upward

D. Downward

Correct Answer: A

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Question 5

A diagram of a titration setup is shown below. If the burette contains 0.1 M HCl and the initial volume is 10 mL, what is the concentration of the solution after adding 20 mL of NaOH?

A. 0.05 M

B. 0.1 M

Correct C. 0.15 M

D. 0.2 M

Correct Answer: C

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Question 6

In a eukaryotic cell, the process of photosynthesis occurs in the mitochondria.

A. True

Correct B. False

C. Photosynthesis occurs in the chloroplasts

D. Photosynthesis occurs in the nucleus

Correct Answer: B

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Question 7

The process of cellular respiration can be represented by the equation: \( C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP \).

A. This equation represents the process of photosynthesis

Correct B. This equation represents the process of cellular respiration

C. This equation represents the process of digestion

D. This equation represents the process of excretion

Correct Answer: B

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Question 8

In a typical plant cell, the vacuole is responsible for storing water, salts, and other subs\tances.

Correct A. True

B. False

C. The vacuole is responsible for storing waste products

D. The vacuole is responsible for storing nutrients

Correct Answer: A

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Question 9

The process of digestion \begins in the mouth, where food is broken down by enzymes.

Correct A. True

B. False

C. The process of digestion \begins in the stomach

D. The process of digestion \begins in the small intestine

Correct Answer: A

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Question 10

The diagram below shows the structure of a typical animal cell.

Correct A. The nucleus is the control center of the cell

B. The mitochondria are responsible for generating energy

C. The vacuole is responsible for storing waste products

D. The cell membrane is the outermost layer of the cell

Correct Answer: A

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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. 0.72

D. 0.84

Correct Answer: B

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Question 12

The diagram below shows a cross-section of a plant root. Which of the following tissues is responsible for the absorption of water and minerals from the soil?

A. Dermal tissue

Correct B. Vascular tissue

C. Ground tissue

D. Epidermal tissue

Correct Answer: B

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Question 13

The human kidney filters waste products from the blood and excretes them in the form of urine. Which of the following structures is responsible for the reabsorption of glu\cose from the filtrate?

Correct A. Proximal convoluted tubule

B. Distal convoluted tubule

C. Loop of Henle

D. Collecting duct

Correct Answer: A

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Question 14

The diagram below shows a cross-section of a blood vessel. Which of the following structures is responsible for the regulation of blood pressure?

A. Tunica intima

Correct B. Tunica media

C. Tunica externa

D. Smooth muscle

Correct Answer: B

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Question 15

The human eye is able to detect a wide range of wavelengths of light. Which of the following structures is responsible for the detection of light?

A. Cornea

B. Iris

Correct C. Retina

D. Lens

Correct Answer: C

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Question 16

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?

A. 0.16

B. 0.32

Correct C. 0.64

D. 0.8

Correct Answer: C

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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. 1

Correct Answer: A

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Question 18

In a human population, the frequency of the 'A' allele is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous recessive genotype?

A. 0.16

Correct B. 0.36

C. 0.64

D. 0.8

Correct Answer: B

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Question 19

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. 0.25

Correct B. 0.5

C. 0.75

D. 1

Correct Answer: B

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Question 20

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?

A. 0.16

B. 0.32

Correct C. 0.64

D. 0.8

Correct Answer: C

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Question 21

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

A. Regulation of body temperature

B. Control of hunger and thirst

Correct C. Stimulation of the pituitary gland

D. Inhibition of the adrenal glands

Correct Answer: C

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Question 22

A diagram of a plant cell is shown below. Identify the part labeled 'A'.

A. Mitochondria

B. Chloroplast

Correct C. Nucleus

D. Vacuole

Correct Answer: C

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Question 23

A 25-year-old male patient presents with symptoms of hypogonadism. Which of the following hormones is most likely to be deficient?

A. Insulin

B. Growth hormone

Correct C. Testosterone

D. Adrenaline

Correct Answer: C

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Question 24

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

A. Esophagus

Correct B. Small intestine

C. Liver

D. Pancreas

Correct Answer: B

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Question 25

A 35-year-old female patient presents with symptoms of hyperthyroidism. Which of the following hormones is most likely to be overproduced?

A. Adrenaline

B. Insulin

Correct C. Thyroxine

D. Growth hormone

Correct Answer: C

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