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Q. No.

Consider the following two statements:

I. Plants with C3 pathway have a single type of photosynthetic cell: the mesophyll cell.
II. Their bundle sheath cells do not contain chloroplasts.
 
1. Both I and II are correct
2. Only I is correct
3. Only II is correct
4. Both I and II are incorrect
Subtopic:  Dark Reaction : Calvin Cycle |
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Hints

Identify the incorrect match:

C3 plants C4 plants
1. Primary carbon dioxide acceptor RuBP PEP
2. Primary carbon dioxide fixation product PGA OAA
3. Presence of PEPcase Yes Yes
4. Cell type in which initial carboxylation reaction occurs Mesophyll Bundle sheath
Subtopic:  Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
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Hints
Calvin cycle is described under three stages – I: Carboxylation; II: Reduction and III: Regeneration. ATP is required during stage/s:
1. Only I 2. Only I and III
3. Only II and III 4. Only IV
Subtopic:  Dark Reaction : Calvin Cycle |
 77%
From NCERT
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Please attempt this question first.
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Consider the two statements:

I.  A poison that inhibits an enzyme of the Calvin cycle will also inhibit light reactions.
II.  The light reactions require ADP and NADP+ which would not be produced in sufficient quantities if the Calvin cycle stopped.

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
Subtopic:  Dark Reaction : Calvin Cycle |
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Hints

Consider the two statements:

I. The C4 photosynthesis pathway uses more energy than the C3 photosynthesis pathway.
II. C4 plants are able to more efficiently fix carbon in drought, high temperatures, and in limitations of nitrogen or CO2.
 
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect
Subtopic:  Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
From NCERT

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