Photosynthesis in Higher Plants

In sugarcane plant 14CO2 is fixed to malic acid, in which the enzyme that fixes CO2 is

1. ribulose bisphosphate carboxylase
2. phosphoenolpyruvic acid carboxylase
3. ribulose phosphate kinase
4. fructose phosphate.

Stomata of CAM plants

1. are always open
2. open during the day and close at night
3. open during the night and close during the day
4. never open.

Which element is located at the centre of the porphyrin ring in chlorophyll?

1. Calcium
2. Magnesium
3. Potassium
4. Manganese

Which one of the following concerns photophosphorylation?

1. ADP + AMP Light energy ATP
2. ADP + Inorganic PO4 Light energy ATP
3. ADP + Inorganic PO4 ATP
4. AMP + Inorganic PO4 Light energy ATP

Which of the following absorbs light energy for photosynthesis?

1. Chlorophyll
2. Water molecule
3. O2
4. RuBP

In photosynthesis energy from light reaction to dark reaction is transferred in the form of

1. ADP
2. ATP
3. RuDP
4. chlorophyll

Which pigment system is inactivated in red drop?

1. PS-I and PS-II
2. PS-I
3. PS-II
4. None of the above

Which pair is wrong?

1. C3-maize
2. C4-Kranz anatomy
3. Calvin cycle-PGA
4. Hatch and Slack cycle-OAA

Which is the first CO2 acceptor enzyme in C4 plants?

1. RuDP carboxylase
2. Phosphoric acid
3. RuBisCO
4. PEP- carboxylase

For assimilation of one CO2 molecule, the energy required in form of ATP and NADPH2 are

1. 2 ATP and 2 NADPH2
2. 5 ATP and 3 NADPH2
3. 3 ATP and 2 NADPH2
4. 18 ATP and 12 NADPH2