Waec Biology 2001 Past Questions and Answers

Question 6:

• WAEC 2001

The major function of the cell membrane is that it

A. Delimits the cytoplasm
B. Synthesizes protein
C. Breaks down worn-out organelles
D. Is the site for photosynthesis

Question 7:

• WAEC 2001

Carbohydrates are stored in the animal cell in the form of

A. Starch
B. Glycogen
C. Plastid
D. Maltose

Question 8:

• WAEC 2001

A piece of yam weighing 1.0 gm was put into some salt solution. After 3 hours, it was removed and weighed.
The recorded weight was 1.2gms. This simple experiment demonstrates that the

A. Salt solution is more concentrated than the cell sap of the yam.
B. Cell sap of the yam is more concentrated than the salt - solution
C. Salt solution has the same concentration as the cell sap of the yam.
D. The yam lost some water molecules to the salt solution.

Question 9:

• WAEC 2001

A major reason why the red blood cells can survive in the blood is that the

A. Blood plasma and the red blood cells are isotonic
B. Red blood cells are hypotonic to the plasma
C. The red blood cells are hypertonic to the blood plasma
D. The red blood cells receive digested nutrients

Question 10:

• WAEC 2001

Which of the following phenomena affects plants growth in an alkaline soil?

A. Excessive plasmolysis
B. Excessive transpiration
C. Excessive sunlight
D. Poor drainage