Nutrition - Jamb Biology Past Questions and Answers

Question 11:

• JAMB 1978

Given the equation:
6CO2 + 6H2O → C6H12O6 + 6O2 {Under sunlight & Chlorophyll)
The oxygen given off during the above process is derived from

A. Sunlight
B. Chlorophyll
C. Carbon dioxide
D. Atmosphere
E. Water

Question 12:

• JAMB 1978

when protein are broken down they provide

A. Oxygen
B. Carbonhydrate
C. Energy
D. Amino-acid
E. Carbon dioxide

Question 13:

• JAMB 1978

Nitrifying bacteria keep the soil fertile by

A. Converting nitrate to nitrogen
B. Converting ammonium salt to nitrate
C. Converting atmospheric nitrogen to plant nitrogen
D. Converting nitrate to nitrous oxide
E. Converting atmospheric nitrogen to nitrates

Question 14:

• JAMB 1978

Rhizopus (or mucor)obtain its food from dead organic matter extracellularly. It is said to be

A. A facultative parasite
B. Saprophyte
C. An obligate parasite
D. A commensal
E. An autotroph

Question 15:

• JAMB 1978

which of these elements in plants is required in small quantities only

A. Boron
B. Nitrogen
C. Phosphorus
D. Magnesium
E. Potassium