Which of the following is not a product of light reaction of photosynthesis?
1. ATP
2. NADH
3. NADPH
4. Oxygen

Subtopic:  Light Reaction: Photophosphorylation |
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Oxygen is not produced during photosynthesis by
1. Green sulphur bacteria
2. Nostoc
3. Cycas
4. Chara

 

Subtopic:  Historical View: Experiments |
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Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in

(1) C3 -plants 

(2) C4 -plants

(3) C2 -plants

(4) C3 and C4 -plants

Subtopic:  C4 Cycle (Hatch & Slack Pathway) |
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With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

(1) Light saturation for CO2-fixation occurs at 10% of full sunlight.

(2) Increasing atmospheric CO2 concentration upto 0.05% can enhance the CO2-fixation rate

(3) C3 plants respond to higher temperature with enhanced photosynthesis, while C4 plants have a much lower temperature optimum.

(4) Tomato is a greenhouse crop, which can be grown in a CO2-enriched atmosphere for higher yield. 

Subtopic:  C4 Cycle (Hatch & Slack Pathway) |
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With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

1. increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate

2. C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum

3. Tomato is a greenhouse crop which can be grown in CO2 enriched atmosphere for higher yield

4. Light saturation for CO2 fixation occurs at 10% of full sunlight

Subtopic:  Factors Affecting Photosynthesis |
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Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:

1. C4 plants

2. C2 plants

3. C3 and C4 plants

4. C3 plants

Subtopic:  C4 Cycle (Hatch & Slack Pathway) |
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The process which makes major difference between C3 and C4 Plants is

(1) lycosis

(2) Clavin cycle

(3) photorespiration

(4) respiration

Subtopic:  Photorespiration |
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Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options. 

1. Both process can happen together because the diffusion coefficient of water and CO2 is different. 

2. The above processes happen only during night time

3. One process occurs during the day time and the other night

4. Both processes cannot happen simultaneously

Subtopic:  Factors Affecting Photosynthesis |
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A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?

(1) C4

(2) CAM

(3) Nitrogen-fixer

(4) C3

Subtopic:  C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples | Question on C4 Pathway |
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Emerson's enhancement effect and red drop have been instrumental in the discovery of 

(1) two photosystems operating simultaneously

(2) photophosphorylation and cyclic electron transport. 

(3) Oxidative phosphorylation

(4) photophosphorylation and non-cyclic electron transport

Subtopic:  Emerson's Enhancement Experiment |
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