Jamb Biology 1982 Past Questions and Answers

Question 21:

• JAMB 1982

Treatment of a poor soil with lime supplies

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

Question 22:

• 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 23:

• JAMB 1982

ONE of the major causes of haemophilia is lack of

A. Firbrinogen
B. Amylase
C. White blood corpuscles
D. Red blood corpuscles
E. Plasma

Question 24:

• 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 25:

• 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