Question

Thylakoid is

• A. the aqueous fluid enclosed by the inner membrane of the chloroplast
• B. the site for the dark reaction of photosynthesis
• C. a flattened disc-like sac in chloroplast
• D. the site of protein synthesis in chloroplasts

Answer 1

The correct option is C a flattened disc-like sac in chloroplast

The given diagram is the structure of a chloroplast. It is a double membranous structure. The aqueous fluid enclosed by the inner membrane of the chloroplast is called the stroma. It is a site for the dark reaction of photosynthesis. Disc-shaped structures called thylakoids are stacked above one another to form the granum. Each granum is interconnected by the stroma lamella. The space enclosed by the thylakoid membrane is called the lumen. Photophosphorylation takes place inside the lumen of thylakoids.