Jamb Biology 1984 Past Questions and Answers

Question 16:

• JAMB 1984

Pepsin is a digestive enzymes which breaks

A. Cellulose into glucose molecules
B. Carbohydrates into simple sugars
C. Protein into peptones
D. Fats into glycerol and fatty acid
E. Sucrose into glucose and fructose

Question 17:

• JAMB 1984

Anaerobic respiration in yeast produces

A. Carbondioxide and ethanol
B. Carbondioxide and water
C. Carbondioxide and oxygen
D. Carbondioxide and glucose
E. Ethanol and water

Question 18:

• JAMB 1984

Underground stems which grow horizontally through the soil are

A. Bulbs
B. Rhizomes
C. Runners
D. Corms
E. Stolons

Question 19:

• JAMB 1984

A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin?

A. AA
B. OO
C. AO
D. AS
E. SS

Question 20:

• JAMB 1984

In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results?

A. Mercurous nitrates
B. Copper sulphate
C. Mercuric nitrate
D. Sodium carbonate
E. Ammonium hydroxide