Practice Post UTME BSU biology 2020 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?

A. 0.36

B. 0.64

C. 0.16

D. 0.84

Question 2

The growth and development of an organism are influenced by a variety of factors, including genetics, environment, and nutrition. Which of the following is a type of growth that occurs in response to an increase in the availability of nutrients?

A. Hormonal growth

B. Nutritional growth

C. Genetic growth

D. Environmental growth

Question 3

A diagram of a plant's root system is shown below. Which of the following statements is true about the root system?

A. It is responsible for absorbing water and minerals from the soil.

B. It is responsible for transporting sugars and other organic compounds from the leaves to the rest of the plant.

C. It is a type of tissue found only in animals.

D. It is responsible for photosynthesis.

Question 4

A 1.5 kg block is moving at a speed of 4 m/s when it collides with a stationary 2.0 kg block. If the collision is perfectly inelastic, what is the speed of the combined blocks after the collision?

A. 2.0 m/s

B. 2.5 m/s

C. 3.0 m/s

D. 3.5 m/s

Question 5

A 5-year-old child is diagnosed with a rare genetic disorder characterized by an inability to synthesize the amino acid phenylalanine. Which of the following enzymes is deficient in this disorder?

A. Phenylalanine hydroxylase

B. Tyro\sine aminotransferase

C. Histidine decarboxylase

D. Tryptophan synthase

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 dominant allele 'A'?

A. 0.8

B. 0.6

C. 0.4

D. 0.2

Question 7

A patient with a rare genetic disorder has a mutation in the gene encoding the enzyme responsible for converting phenylalanine to tyro\sine. Which of the following is a likely consequence of this mutation?

A. Increased levels of phenylalanine in the blood

B. Decreased levels of tyro\sine in the blood

C. No effect on phenylalanine or tyro\sine levels

D. Increased risk of developing Parkinson's disease

Question 8

A cell in interphase has a DNA content of 6.0 pg. If the cell enters mitosis and undergoes two successive cell divisions, what will be the DNA content of the daughter cells?

A. 3.0 pg

B. 6.0 pg

C. 12.0 pg

D. 24.0 pg

Question 9

In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the Δπελγαμυσ \( Delta-Peptide \) of the Δπελοτερ \( Pre-Telophase \) protein. Which of the following is a characteristic of the Δπελοτερ protein?

A. It is a type of histone protein

B. It is a component of the nuclear envelope

C. It is a transcription factor

D. It is a protein kinase

Question 10

A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?

A. 0

B. 1

C. 2

D. 3

Question 11

Which of the following microorganisms is responsible for cau\sing tuberculosis?

A. Bacillus anthracis

B. Mycobacterium tuberculosis

C. Escherichia coli

D. Staphylococcus aureus

Question 12

A patient is diagnosed with a type of cancer that is characterized by the uncontrolled growth of epithelial cells. Which of the following types of cancer is most likely to be diagnosed in this patient?

A. Carcinoma

B. Sarcoma

C. Leukemia

D. Lymphoma

Question 13

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

B. 0.64

C. 0.72

D. 0.84

Question 14

A diagram of a plant's xylem and phloem tissues is shown below. Which of the following statements is true about the xylem tissue?

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

B. It transports sugars and other organic compounds from the leaves to the rest of the plant.

C. It is responsible for photosynthesis.

D. It is a type of tissue found only in animals.

Question 15

A diagram of the human respiratory system is shown below. Which of the following is a function of the alveoli?

A. Exchange of oxygen and carbon dioxide

B. Regulation of body temperature

C. Production of red blood cells

D. Storage of oxygen

POST UTME BSU 2020 Biology | Objective

Master the Exam!

Help others prepare! Share this practice hub: