JAMB Biology Past Questions & Answers - Page 292

1,456.

The companion cells are part of the

A.

pericycle

B.

phloem

C.

pith

D.

xylem

Correct answer is B

No explanation has been provided for this answer.

1,457.

A band of connective tissue linking two bones in a joint is known as a

A.

tendon

B.

cartillage

C.

synovial membrane

D.

ligament

Correct answer is D

No explanation has been provided for this answer.

1,458.

The process of deamination is essential for

A.

protein digestion

B.

bile secretion

C.

urea formation

D.

antibody formation

Correct answer is A

Deamination is the removal of an amine group from a molecule of amino acid. The enzymes that are in general responsible for this reaction are called deaminases.In humans, deamination takes place primarily in the liver, however glutamate is also deaminated in the kidneys. In situations of excess protein intake, deamination is used to break down amino acids for energy.

1,459.

Stomatal pores open when there is

A.

an increase in the sugar content of guard cells

B.

a decrease in the osmotic concentration of the guard cell

C.

a decrease in the sugar content of mesophyll cells

D.

an increase in the sugar content of mesophyll cells

Correct answer is A

No explanation has been provided for this answer.

1,460.

Anaerobic respiration differs from aerobic respiration by the production of

A.

less energy and water

B.

greater energy and alcohol

C.

less energy and alcohol

D.

greater energy and water

Correct answer is C

No explanation has been provided for this answer.