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Syllabus
i) the thickness of cuticle
ii) the distribution of stomata
iii) the size of the leaf
influence the amount of light and the amount of CO2 entering the leaf?
Please mention whether they are directly or inversely proportional to the factors mentioned above.
The graph shows the relation between influence of light intensity of CO2 concentration on the rate of photosynthesis of Chlorella:
Which on of the following statements explains the diagram correctly?
(A) At low light intensity, the light- dependent reaction is rate limiting but at high light intensity, CO2 is rate limiting
(B) The number of chlorophyll molecules limits the rate of photosynthesis.
(C) Photosynthesis is independent of light intensity provided there is not total darkness.
(D) Chlorophyll responds equally to light intensities and CO2 concentrations, thereby limiting the rate of photosynthesis.
The absorbed blue and red lights are most effective for photosynthesis.
Why is it not possible to demonstrate respiration in a green plant kept in sunlight?
Oxygen is a waste product of photosynthesis. Give reason.
A.carbon dioxide is reduced and water is oxidized.
B.water is reduced and carbon dioxide is oxidized.
C.both carbon dioxide and water oxidized
D. both carbon dioxide and water are reduced.
2.the specific function of light energy in the process of photosynthesis is to:
a.reduce carbon dioxide.
b. synthesized glucose .
c.activate chlorophyll .
d.split water molecules.
4. Chlorophyll in a leaf is required for
(a) breaking down water into hydrogen and oxygen.
(b) emitting green light. (c) trapping light energy.
(d) storing starch in the leaves.
5. If the rate of respiration becomes more than the rate of photosynthesis, plants will :
(a) continue to live, but will not be able to store food.
(b) be killed instantly.
(c) grow more vigorously because more energy will available.
(d) stop growing and die gradually of starvation.