NEET · Biology · STD 11 - 11. photosynthesis in higher plants

How many \(ATP\) and \(NADPH _2\) are required for the synthesis of one molecule of Glucose during Calvin cycle?

A \(18\,ATP\) and \(16\,NADPH _2\)
B \(12\,ATP\) and \(12\,NADPH _2\)
C \(18\,ATP\) and \(12\,NADPH _2\)
D \(12\,ATP\) and \(16\,NADPH _2\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(18\,ATP\) and \(12\,NADPH _2\)

Step-by-step Solution

Detailed explanation

For every \(CO _2\) molecule entering the Calvin cycle, 3 molecules of ATP and 2 of \(NADPH _2\) are required. To make one molecule of glucose, 6 turns of the cycle are required. Thus, \(ATP\) and \(NADPH _2\) molecules required for synthesis of one molecule of glucose during Calvin cycle will be \(\rightarrow 6 \times\left[\begin{array}{l}3 ATP \\ 2 NADPH _2\end{array}\right]=\frac{18 ATP \text { and }}{12 NADPH _2}\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Match the items given in Column \(I\) with those in Column \(II\) and select the correct option given below:

Column \(I\)	Column \(II\)
\((a)\)Tidal volume	\((i)\) \(2500-3000\,mL\)
\((b)\)Inspiratory Reserve volume	\((ii)\) \(1100 -1200\,mL\)
\((c)\)Expiratory Reserve volume	\((iii)\) \(500 -550\,mL\)
\((d)\) Residual volume	\((iv)\) \(1000-1100\,mL\)

NEET 2018 Medium

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