Statement $- I :-$ Plastids are found in all plant and animal cells.
Statement $- II :-$ Aleuroplast store carbohydrate.

Are the different types of plastids interchangeable? If yes,give examples where they are getting converted from one type to another.

Which plastid is present in the mesophyll tissue of a leaf?

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

Select the correct option for the size of the chloroplast.

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.