The red color of tomatoes and chilies is due to the presence of which of the following?

What cell structure is suggested by the given figure?

Which of the following statements are correct?
$(A)$ The number of chloroplasts varies from $1$ per cell in $Chlamydomonas$, a green alga, to $20-40$ per cell in the mesophyll.
$(B)$ Out of the two membranes of chloroplasts and mitochondria, the inner membrane is relatively less permeable.
$(C)$ Thylakoids are arranged in stacks like the piles of coins called grana (singular: granum) or the intergranal thylakoids.
$(D)$ The stroma of the chloroplast contains enzymes required for the synthesis of carbohydrates and proteins.

The bright colours of ripe fruits are due to

The flattened sac-like structures arranged like a stack of coins in the grana are called:

Which of the following is not a part of the endomembrane system?