Assertion(A) : Dark reaction is purely enzymatic reaction.
Reason(R) : It occurs only in absence of light.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

 

Subtopic:  Dark Reaction: Biosynthetic Phase |
 74%
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Assertion(A) : Protons produced by photolysis of water accumulate in the lumen of thylakoids.
Reason(R) : Photolysis of water takes place towards lumen side of thylakoid.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

Subtopic:  Chemiosmotic hypothesis |
 78%
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Assertion(A) : Cplants can show CO2  fertilisation effect.
Reason(R) : If atmospheric COconcentration increases then, C3 plants will be benefitted.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.


 
Subtopic:  C4 Cycle (Hatch & Slack Pathway) |
 67%
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Assertion(A) : Tomatoes and bell pepper are C4 plants.
Reason(R) : The current atmospheric COconcentration is nonlimiting for these plants.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

Subtopic:  C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
 58%
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Assertion(A) : The Cplants respond to higher temperatures and show higher rate of photosynthesis than Cplants.
Reason(R) : Cplants are adapted to live in dry warm tropical areas and lack photorespiration.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

Subtopic:  C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
 77%
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Assertion(A) : The light saturation occurs at 10% of the full sunlight in most of the plants.
Reason(R) : Light is rarely a limiting for most of the plants except those which grows in a shade or dense forests.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

Subtopic:  Factors Affecting Photosynthesis |
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Assertion(A) : The tropical plants have a higher temperature optimum than the temperate plants.
Reason(R) : All the tropical plants lack photorespiration 

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

 
Subtopic:  Factors Affecting Photosynthesis |
 53%
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Assertion(A) : Water stress causes the stomata to close thus, reducing the COavailability to plants.
Reason(R) : Water stress makes leaves wilt, thus, reducing the surface area of the leaves and their metabolic activity as well.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. If assertion is true but the reason is false.
4. If both assertion and reason are false statements.

Subtopic:  Factors Affecting Photosynthesis |
 58%
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Which of the following constitutes Hill reaction ?
1. Photolysis by chloroplasts
2. Photolysis of water by isolated chloroplasts forming ATP and NADPH H+
3. Photolysis of water by isolated illuminated chloroplasts causing reduction of some chemicals and liberation of oxygen
4. Photolysis of water liberating oxygen and hydrogen by illuminated isolated chloroplasts 
Subtopic:  Historical View: Experiments |
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When the day light hours are increased, the rate of photosynthesis :
1. Increases 
2. Decreases
3. Remains unchanged 
4. At first increases then decreases 
Subtopic:  Factors Affecting Photosynthesis |
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