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Q. No.
Consider the two statements:
I: Not all cells in a multicellular plant contain chloroplasts.
II: The chloroplasts of plant and algal cells can orient themselves to best suit the available light.
 
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic:  Historical View: Experiments | Factors Affecting Photosynthesis |
 81%
Level 1: 80%+
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Energy is transferred from the light reaction step to the dark reaction step by

1. chlorophyll

2. ADP

3. ATP

4. RuBP

Subtopic:  Introduction | Historical View: Experiments | Chloroplast Structure | Photosynthetic Pigments | Redtrop Experiment | Emerson's Enhancement Experiment | Photosystems | Light Reaction: Electron Transport | Light Reaction: Photophosphorylation | Dark Reaction: Biosynthetic Phase |
 83%
Level 1: 80%+
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The current concentration of CO2 in the atmosphere is between

1. 0.03% to 0.04%
2. 21% to 22%
3. 78% to 79%
4. 3% to 4%

Subtopic:  Factors Affecting Photosynthesis |
 96%
Level 1: 80%+
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Assertion(A): Green plants are called autotrophs.
Reason(R): The green plants synthesise the food they need through photosynthesis.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.

 
Subtopic:  Factors Affecting Photosynthesis |
 95%
Level 1: 80%+
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Which of the following plants are grown in green house by exploiting a fact that higher CO2 leads more productivity?
1. Tomatoes
2. Papaya
3. Cycas
4. Pomegranate

Subtopic:  Factors Affecting Photosynthesis |
 94%
Level 1: 80%+
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Light can be limiting factor for photosynthesis for the

1. Tall trees growing in a field
2. Plants growing in shade or in dense forest
3. Shrubs growing in grassland
4. Crop plants growing in crop field

Subtopic:  Factors Affecting Photosynthesis |
 93%
Level 1: 80%+
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The light saturation occurs at _______ of the total sunlight available to the plants. Select the correct option to fill in the blank.

1. 75%
2. 50%
3. 10%
4. 2%

Subtopic:  Factors Affecting Photosynthesis |
 92%
Level 1: 80%+
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Which of the following plants are grown in green house by exploiting the fact that higher CO2 leads to more productivity?
1. Tomatoes
2. Papaya
3. Cycas
4. Pomegranate

Subtopic:  Factors Affecting Photosynthesis |
 92%
Level 1: 80%+
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Why does light rarely act as a limiting factor in photosynthesis for most plants?
1. Light intensity never saturates photosynthesis rates.
2. Light saturation occurs at 100% of full sunlight.
3. Light saturation occurs at 10% of full sunlight for most plants.
4. Shade plants require full sunlight to photosynthesize efficiently.
Subtopic:  Factors Affecting Photosynthesis |
 92%
Level 1: 80%+
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How does water limitation indirectly affect photosynthesis in a plant under normal light and CO2 conditions?
1. Water stress directly impacts the chlorophyll molecule, reducing its light absorption.
2. It limits the plant’s ability to carry out the Calvin cycle by decreasing ATP production.
3. Water stress causes stomatal closure, limiting CO2 uptake and lowering photosynthetic rates.
4. Reduced water decreases light intensity, impacting light reactions.
Subtopic:  Factors Affecting Photosynthesis |
 92%
Level 1: 80%+
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