NEET BIOLOGY

Detailed explanation-1: -Chloroplasts contain a system of membrane sacs, the thylakoids, some of which are stacked to form grana (singular, granum), whereas others float freely in the stroma . It is on the thylakoid membranes that the electron carriers necessary for photosynthesis reside.

Detailed explanation-2: -Stroma is the space inside the inner membrane of the chloroplast. Thylakoids are placed one above the other to form a stack-like structure called a granum.

Detailed explanation-3: -Grana: 1. The thylakoids of the chloroplast form stacks of disks which are called the grana (singular – granum). 2. One thylakoid stack is called a granum.

Detailed explanation-4: -Thylakoids are interconnected disc-like sacs of the internal membrane system of the chloroplast. They are found suspended in the stroma. Thylakoids are arranged in a stack, which is called grana. The thylakoid membrane contains the photosynthetic pigment chlorophyll, which absorbs the sunlight during photosynthesis.

Detailed explanation-5: -: one of the stacks of chlorophyll-containing material in plant chloroplasts.