JAMB Biology Past Questions & Answers - Page 414

2,066.

Which of these is not an enzyme?

A.

Pepsin

B.

Gastrin

C.

Amylase

D.

Chymotrypsin

E.

Trypsin

Correct answer is B

Gastrin is a hormone that is produced by 'G' cells in the lining of the stomach and upper small intestine, and released into the blood circulation.

2,067.

Which one of the following option is not true for mucor of Rhizophus? it

A.

Grows on moist dead organic matter

B.

Is a plant

C.

Has cellulose cell-wall

D.

Reproduce asexually by producing a spore

E.

Has no chlorophyll

Correct answer is C

No explanation has been provided for this answer.

2,068.

The carrier of the hereditary character in plants and animal is the

A.

Cell

B.

Nucleus

C.

Chromosome

D.

Chloroplast

E.

Gene

Correct answer is C

- The Hereditary characters of an organism are determined by genes.

- However, Chromosomes are dark staining structures in a cell's nucleus  on which the organism's genes (DNA molecules) are arranged.

- I.e Chromosomes are the carriers of genes.

- And these genes are located on the Loci of the Chromosome. 

2,069.

A secchi disc is used in the determination of

A.

Rainfall

B.

Tides

C.

Waves

D.

Turbidity

E.

Current velocity

Correct answer is D

No explanation has been provided for this answer.

2,070.

The complex relationship between the members of a community and between the community as a whole and its physical environment is

A.

Ecosystem

B.

Habitat

C.

Environment

D.

Niche

E.

Micro habitat

Correct answer is A

No explanation has been provided for this answer.