Waec Biology 2011 Past Questions and Answers

Question 26:

• WAEC 2011

Kreb’s cycle occurs in the

A. Mitochondria
B. Cytoplasm
C. Nucleus
D. Ribosomes

Question 27:

• WAEC 2011

The process whereby electrons are emitted from chlorophyll and returned to it unchanged is known as

A. Non-cyclic phosphorylation
B. Photochemical reaction
C. Photophorylation
D. Cyclic photophorylatlion

Question 28:

• WAEC 2011

Which of the following statements about photosynthesis is not true?

A. Plants can photosynthesize without an increase in dry weight
B. Carbon dioxide is absorbed by the leaves in bright light
C. Oxygen is produced during photosynthesis from the breakdown of water
D. Photosynthesis occurs in green plants

Question 29:

• WAEC 2011

The removal of all the phloem tissues of the stem of a plant close to the root system for a long period of time is likely to

A. Provide more energy to the roots
B. Accumulate more starch in the roots
C. Cause the underground roots to develop buds
D. Cause the p ant to wither and die

Question 30:

• WAEC 2011

Which of the following groups of substances are not six-carbon compounds?

A. Glucose and lactose
B. Lactose and cellulose
C. Glucose, Lactose and Pyruvate
D. Pyruvate and cellulose