Jamb Biology Past Questions and Answers

Question 471:

• JAMB 1986

The aperture between the left auricle and the left ventricle is guarded by the

A. Auricles valve
B. Tricupid valve
C. Ventricles valve
D. Bicuspid valve

Question 472:

• 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 473:

• 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

Question 474:

• JAMB 1986

The equation that can be used to summarize the process of anaerobic breakdown of sugar is

A. C₂H₁₂O₆ 2C₂H₅OH + 2CO₂
B. 6Co₂ + 6H₂O C₆H₁₂O₆ + 6O₂
C. C₆H₁₂O₆ + 6O₂ 6CO₂ + 6H₂O + enegy
D. C₆H₁₂O₆ 2C₂H₅OH + 2CO₂ + energy

Question 475:

• JAMB 1986

If a person is bitten by a snake on the leg, it is advisable for him to

A. Keep moving so that the venom will ooze out with bleeding
B. Wash the wound with water containing antiseptic
C. Bandage the wound so that germs do not get in through it
D. Keep still and apply a tourniquet above the wound