NEET · Biology · STD 11 - 8. Cell the unit of life

The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are

A stroma lamellae
B stroma
C cristae
D grana

Verified Solution

Answer & Solution

Correct Answer

(D) grana

Step-by-step Solution

Detailed explanation

(d) : A chloroplast is a vesicle, bound by an envelope of two unit membranes and filled with a fluid matrix called stroma. The lamellae, after separation from the inner membrane, usually take the form of closed, flattened, ovoid sacs, the thylakoids, which lie closely packed in piles, the grana.

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.

Same subject

Match List \(I\) with List \(II\).

List \(I\)	List \(II\)
\(A\). Vasectomy	\(I\). Oral method
\(B\). Coitus interruptus	\(II\). Barrier method
\(C\). Cervical caps	\(III\). Surgical method
\(D\). Saheli	\(IV\). Natural method

Choose the correct answer from the options given below:

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