Practice Post UTME MADONNA UNIVERSITY biology 2025 Past Questions

Question 1 View Details

In the xylem transport system, what is the primary function of the xylem parenchyma cells?

Correct A. To store water and minerals

B. To produce xylem sap

C. To transport xylem sap

D. To regulate water potential

Correct Answer: A

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Question 2 View Details

What is the primary difference between the prokaryotic and eukaryotic cells?

Correct A. The presence of a nucleus

B. The absence of a cell wall

C. The presence of mitochondria

D. The absence of a Golgi apparatus

Correct Answer: A

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Question 3 View Details

In the process of mitosis, what is the function of the anaphase stage?

Correct A. To separate the sister chromatids

B. To align the chromosomes at the metaphase plate

C. To condense the chromosomes

D. To de-condense the chromosomes

Correct Answer: A

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Question 4 View Details

What is the primary function of the centrioles in the cell?

Correct A. To form the spindle fibers

B. To form the centrioles

C. To form the cilia

D. To form the flagella

Correct Answer: A

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Question 5 View Details

In the process of meiosis, what is the function of the pachytene stage?

A. To synapse the homo\logous chromosomes

Correct B. To form the synaptonemal complex

C. To separate the homo\logous chromosomes

D. To form the chiasmata

Correct Answer: B

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Question 6 View Details

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 7 View Details

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 View Details

A solution of 0.1 M NaCl is diluted to 0.01 M. What is the new concentration of Na+ ions?

A. 0.005

B. 0.01

Correct C. 0.02

D. 0.05

Correct Answer: C

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Question 9 View Details

A 2.0 L flask contains 0.5 M HCl. What is the concentration of H+ ions in the solution?

A. 0.25

B. 0.5

Correct C. 1.0

D. 2.0

Correct Answer: C

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Question 10 View Details

A 5.0 L flask contains 0.2 M NaOH. What is the concentration of OH- ions in the solution?

A. 0.01

B. 0.02

Correct C. 0.04

D. 0.08

Correct Answer: C

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Question 11 View Details

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 homozygous dominant genotype?

Correct A. 0.36

B. 0.64

C. 0.16

D. 0.04

Correct Answer: A

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Question 12 View Details

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 13 View Details

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

Correct A. To focus light on the retina

B. To detect light intensity

C. To regulate pupil size

D. To produce tears

Correct Answer: A

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Question 14 View Details

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

A. To pump blood to the lungs

Correct B. To pump blood to the body

C. To regulate blood pressure

D. To produce blood cells

Correct Answer: B

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Question 15 View Details

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

Correct A. To exchange oxygen and carbon dioxide

B. To regulate breathing rate

C. To produce mucus

D. To detect odors

Correct Answer: A

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Question 16 View Details

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 recessive genotype 'aa'?

Correct A. 0.04

B. 0.16

C. 0.36

D. 0.64

Correct Answer: A

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Question 17 View Details

Which of the following is a characteristic of the xylem in plants?

Correct A. It transports water and minerals from the roots to the leaves.

B. It transports sugars and amino acids from the leaves to the roots.

C. It provides structural support to the plant.

D. It stores food in the form of starch.

Correct Answer: A

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Question 18 View Details

A solution of 0.1 M NaCl is prepared by dissolving 5.85 g of NaCl in 1000 mL of water. What is the concentration of the solution in molarity?

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 19 View Details

A population of 1000 individuals has a mean height of 170 cm. If 10% of the population has a height of 180 cm, what is the s\tandard deviation of the population?

A. 2.5 cm

Correct B. 5 cm

C. 10 cm

D. 15 cm

Correct Answer: B

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Question 20 View Details

A cell divides by mitosis to produce two daughter cells. If the original cell has a DNA content of 2C, what is the DNA content of each daughter cell?

Correct A. 1C

B. 2C

C. 3C

D. 4C

Correct Answer: A

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Question 21 View Details

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 22 View Details

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 23 View Details

A neuron has a resting potential of -70 mV. If it is depolarized to -60 mV, what is the change in the membrane potential?

A. 5

Correct B. 10

C. 15

D. 20

Correct Answer: B

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Question 24 View Details

A 2.5 L flask contains 0.5 M glu\cose solution. What is the number of moles of glu\cose in the flask?

A. 0.5

Correct B. 1.25

C. 2.5

D. 5

Correct Answer: B

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Question 25 View Details

A 50 g sample of a subs\tance has a mass of 25 g after being dried in an oven at 105°C for 24 hours. What is the percentage of water in the sample?

A. 25

Correct B. 50

C. 75

D. 90

Correct Answer: B

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