FORM AND FUNCTIONS - Jamb Biology Past Questions and Answers

Question 161:

• JAMB 1982

Refrigeration, as a method of preservation, has ONE of the following characteristics:

A. Kills all the bacteria
B. Kill most of the bacteria
C. Makes the bacteria inactive
D. Dries food
E. Hydrolyses food

Question 162:

• JAMB 1982

Treatment of a poor soil with lime supplies

A. Sulphur
B. Calcium
C. Phosphorus
D. Sodium
E. Nitrogen

Question 163:

• JAMB 1982

In the enzyme (amlyase) reactions of starch → sugar
starch is referred to as the

A. Substrate
B. Product
C. Enzyme
D. Enzyme-substrate complex
E. Reaction mixture

Question 164:

• JAMB 1982

In man, identical twins occur when

A. An ovum is fertilized by a sperm and then divide into two, each forming a separate embryo
B. An ovum fertilized by two sperms and then divides into two, each forming an embryo
C. Two ova are fertilized at the same tine each forming an embryo
D. Two ova are fertilized by a single sperm each forming an embryo after fertilization
E. One ovum first divides into two and each half is fertilized by a sperm before developing into an embryo

Question 165:

• JAMB 1982

The parts of the mammalian eye that strongly bend light rays are the

A. Cornea and the lens
B. Cornea and aqueous humour
C. Cornea and vitreous humour
D. Lens and aqueous humour
E. Lens and vitreous humour