Question

In the chloroplast the stroma lamellae:

• A. Have both PS II and NADP reductase enzyme
• B. Lack PS II and have NADP reductase enzyme.
• C. Lack NADP reductase enzyme but have PS II.
• D. Lack PS II as well as NADP reductase Enzyme

Answer 1

The correct option is D

Lack PS II as well as NADP reductase Enzyme

The correct option is D

Explanation of the correct option:

1. Photosynthetic pigments and coupling factors can be found in thylakoid membranes.
2. They are found in groups known as photosystems (previously quantasomes).
3. Two systems of photosystems exist i.e. Photosynthesis I & Photosystnesis II.
4. PSI and PSII are present in the grana lamellae, while PSII and the NADP reductase enzymes are absent in the stroma lamellae.

Explanation of the incorrect option:

Option A:

The membrane lamellae have both PS II and NADP reductase enzymes.

Option B:

No lamellae have this type of composition.

Option C:

No lamellae have this type of composition.

Final Answer: -In chloroplast, the stroma lamellae lack PS II as well as NADP reductase enzyme.