A neurone that transmits impulses directly from sensory cells is called

A. an afferent neurone

B. an efferent neurone

C. a relay neurone

D. a peripheral neurone

Protection of the body cells of mammals against ultra-violet rays of the sun is brought about by

A. keratin

B. melanin

C. sebum

D. scales

In which of the following organisms is parental care manifested?

A. Tilapia

B. Toad

C. Cockroach

D. Snail

The site for production of a ATP in a cell is

A. ribosome

B. cytoplasm

C. Golgi body

D. mitochondrion

In testing for starch in a leaf, the leaf is boiled in alcohol to

A. kill the cells

B. soften the leaf

C. enable chemicals penetrate the leaf

D. decolourise the leaf

The mode of nutrition common to green plants is

A. autotrophic

B. heterotrophic

C. holozoic

D. saprophytic

Micronutrients essential for the synthesis of chlorophyll include

A. iron and potassium

B. iron and magnesium

C. magnesium and calcium

D. magnesium and potassium

Biuret’s test is carried out on a food substance to indicate the presence of

A. vitamins B

B. fats

C. proteins

D. starch

In a test for non-reducing sugars like sucrose, what is the significance of adding dilute hydrochloric acid to the original sugar solution? To

A. hydrolyse the non-reducing sugar

B. accelerate he rate of the reaction

C. stabilize the medium

D. sterilize the solution

The colour that is associated with a positive iodine test is

A. brown

B. red

C. blue-black

D. yellow