NEET BIOLOGY

Detailed explanation-1: -Grana are connected by stromal lamellae, extensions that run from one granum, through the stroma, into a neighbouring granum. The thylakoid membrane envelops a central aqueous region known as the thylakoid lumen.

Detailed explanation-2: -Stromal lamellae are extensions that pass from one granum through the stroma and into another. They connect with grana. Grana lamellae are located inside the grana region and are found between the grana.

Detailed explanation-3: -Stroma Lamellae – Meaning There are flat membranous tubules called the stromal lamellae that connect the thylakoids of the different grana.

Detailed explanation-4: -Lamellae of chloroplast is a thin layer or membrane present in it. Option A-Granum: It is a stacked portion of the thylakoid membrane. It functions in the light reactions of photosynthesis, there are 10 to 100 grana in a chloroplast.

Detailed explanation-5: -Granum and stroma lamellae A granum (plural grana) is a stack of thylakoid discs. Chloroplasts can have from 10 to 100 grana. Grana are connected by stroma thylakoids, also called intergranal thylakoids or lamellae. Grana thylakoids and stroma thylakoids can be distinguished by their different protein composition.