Biology questions and answers

Biology Questions and Answers

How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.

1,756.

The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is

A.

Carbohydrates, fats and oils, water, protein

B.

Fats and oils, carbohydrates, protein, water

C.

Water, fats and oils, carbohydrates, protein

D.

Protein, fats and oils, water, and carbohydrates

Correct answer is B

No explanation has been provided for this answer.

1,757.

The name of the enzyme that catalyses the conversion of glucose to glucose-6-phosphate at the beginning of glycolysis is

A.

phospho-fructokinase

B.

glucose isomerase

C.

hexokinase

D.

glucose-6-kinase

Correct answer is C

No explanation has been provided for this answer.

1,758.

Which of the following factors is likely to increase the rate of transpiration in plants?

A.

A reduction in the number of stomata per unit surface area

B.

Increase in humidity around the leaves of plants

C.

An increase in leaf surface area to volume ratio

D.

Removing leaves from plants

Correct answer is C

No explanation has been provided for this answer.

1,759.

The transportation of water and mineral salts through the xylem vessels is enhanced because the xylem cells are

A.

thickened with lignin

B.

long, narrow tubes placed end to end

C.

close to the endodermis

D.

centrally placed in the roots

Correct answer is B

No explanation has been provided for this answer.

1,760.

The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called

A.

chemosynthesis

B.

photosynthesis

C.

anabolism

D.

catabolism

Correct answer is B

No explanation has been provided for this answer.