Jamb Biology Past Questions and Answers

Question 136:

• JAMB 1979

The digestive enzyme that coagulates proteins in milk is

A. Ptyalin
B. Pepsin
C. Renin
D. Trypsin
E. Amylase

Question 137:

• JAMB 1979

The hepatic portal vein is characterized by

A. Beginning and ending with capillaries
B. Connecting the liver and the kidney
C. Carrying deoxygenated blood
D. Ending with large capillaries
E. Having no capillaries

Question 138:

• JAMB 1979

The blood vessel which carries digested food from the small intestine to the liver is the

A. Renal vain
B. Renal artery
C. Hepatic artery
D. Hepatic portal vein
E. Coelic artery

Question 139:

• JAMB 1979

The maize grain is regarded as a fruit and not a seed because

A. It is covered by a sheath of leaves
B. The testa and fruit wall fuse after fertilization
C. It has both endosperm and cotyledon
D. It has coleorhiza and coleoptile
E. The pericarp and seed coat are separated

Question 140:

• JAMB 1979

Identical twins are produced under one of the following conditions

A. Two oval fertilized at the same time by two sperm
B. One ovum ferilized divides to give two embryos
C. One ovum fertilized, twins formed shortly before birth
D. Two ova fertilized by one sperm
E. One ovum fertilized by two sperm