Top 150+ Solved Photosynthesis MCQ Questions Answer
Q. It is estimated that about 85% of the earth’s photosynthetic activity is carried out by
a. tree
b. savannas
c. phytoplanktons
d. herbaceous plants
Q. In an experiment demonstrating the evolution of oxygen in Hydrilla, Sodium bicarbonate is added to water in the experimental set-up. What would happen if all other conditions are favourable ?
a. Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarbonate.
b. Amount of oxygen evolved increases as the avilability of carbon dioxide increases
c. Amount of oxygen evolved decreases as the avilability of carbon dioxide increases
d. Amount of oxygen evolved increases as carbon dioxide in water is absorbed by sodium bicarbonate
Q. In C4 plants, the bundle sheath cells.
a. have thin walls to facilitate gaseous exchange
b. have large intercellular spaces
c. are rich in PEP carboxylase
d. have a high density of chloroplasts
Q. The fixation and reduction of CO2 occur in preence of
a. ATP
b. ATP and NADPH
c. NADPH, chlorophyll and water
d. ATP, NADPH and light
Q. RUBISCO enzyme is also called as ______.
a. carboxy tetra mutase
b. carboxy di mutase
c. carboxy tri mutase
d. carboxy uni mutase
Q. ______ is precursor for abscissic acid (ABA)
a. Zeatin
b. Lutein
c. Violaxanthin
d. Mevalonic acid
Q. In which of the following light, rate of photosynthesis is maximum?
a. white
b. discontinuous white
c. red
d. blue
Q. During light phase of photosynthesis ______ is oxidized and ______ is reduced.
a. CO2 and Water
b. Water and CO2
c. Water and NADP
d. NADPH2 and CO2