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  • 1(current)
Q. No.
Given below are two statements: 
Assertion (A): Six molecules of CO2 and twelve molecules of NADPH + H+ and 18 ATP are used to form one hexose molecules.
Reason (R): Light reaction results in formation of ATP and NADPH2.
  
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. Both (A) and (R) are false.
  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
 78%
Level 2: 60%+
Hints

How many of the following statements are correct?

i. Products of dark reaction are substrates of light reaction.
ii. Products of light reaction are substrates of dark reaction.
iii. In the stroma, enzymatic reactions incorporate CO2 into the plant leading to the synthesis of sugar.
iv. Dark reactions are directly light-driven.
v. Chloroplast is a single membranous organelle.


1. 2
2. 3
3. 4
4. 1

Subtopic:  Dark Reaction: Biosynthetic Phase | Light Reactions :1 | Light Reactions |
 66%
Level 2: 60%+
Hints
Assertion(A): Immediately after light becomes unavailable, the biosynthetic process continues for some time, and then stops.
Reason(R): It is misnomer to call a biosynthetic phase a dark reaction.

Choices for Assertions and reasons:
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:  Dark Reaction: Biosynthetic Phase |
 61%
Level 2: 60%+
Hints
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Assertion(A): Melvin Calvin contributed to working out the complete biosynthetic pathway of photosynthesis.
Reason(R): He used radioactive 14C in bacterial photosynthesis.

Choices for Assertions and reasons:
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:  Dark Reaction: Biosynthetic Phase |
 54%
Level 3: 35%-60%
Hints
  • 1(current)
Q. No.

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