Question

define stroma and grana present in cell membrane





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Answer 1

In most higher plants, the thylakoids are arranged in tight stacks called grana (singular granum). ... The space between the inner membrane and the thylakoid membrane is filled with stroma, a matrix containing dissolved enzymes, starch granules, and copies of the chloroplast genome.

Answer 2

Stroma and grana are parts of chloroplast. Stroma is a matrix present in the chloroplast. It is bounded by a double membranous sheath. It contains a variety of photosynthetic enzymes, starch grains, DNA and ribosomes. Grana are stacks of membrane-bounded, flattened discoid sacs called as thylakoid.
contains chlorophyll molecules. They are the main functional units of chloroplasts.


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