The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are
- Stroma lamellae
- Cristae
- Stroma
- Grana
Answer
(4) Grana
Solution
As per NCERT, the space limited by the inner membrane of the chloroplast contains a number of organised flattened membranous sacs called thylakoids.
⇒ Thylakoids are arranged in stacks like piles of coins called grana (singular: granum).
∵ Stroma lamellae are flat membranous tubules connecting the thylakoids of different grana, stroma is the matrix and cristae are infoldings of the inner mitochondrial membrane.
∴ The stacks are grana.
Answer: (4)