Question

What are
thylakoids ?????
​

Answer 1

each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.

Hope it helps you

Answer 2

Explanation:

each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.

"thylakoid membranes"

may it helps you please mark me as brainy