FORM AND FUNCTIONS - Jamb Biology Past Questions and Answers

Question 281:

• JAMB 1986

In addition to the high calories derived from fats and oils, they are

A. Used in producing new cells
B. Necessary for enzyme formation
C. Used as insulators for cold
D. Required for growth

Question 282:

• JAMB 1986

The extract from food substance reacting with sodium hydroxide and copper sulphate solutions will produce violet to purple coloration if

A. Fats are presents
B. Carbohydrate is present
C. Protein is present
D. Reducing sugar is presents

Question 283:

• JAMB 1986

Which is the correct order of water loss from the leaf? 1 Mesophyll 2 Veins 3 Substomatals cavity 4 Stomata

A. 3 → 2 → 1 → 4
B. 2 → 3 → 1 → 4
C. 2 → 1 → 3 → 4
D. 1 → 2 → 3 → 4

Question 284:

• JAMB 1986

A major limitation in the use of the potometer for measuring the rate of transpiration is that

A. It is made of breakable glass materials
B. It measures the rate of water intake
C. It measure the rate of water loss throuh the stern only
D. The movement of the air buble in the potometer cannot be timed accurately

Question 285:

• JAMB 1986

Which of the following statement is NOT correct with respect to inhalation in mammals? The

A. Intercostal muscles contract
B. Diaphragm is raised
C. Ribs are raised
D. Pressure of the thoracic cavity decreases