Plural grana (grā′n?) A stacked membranous structure within the chloroplasts of plants and green algae that contains the chlorophyll and is the site of the light reactions of photosynthesis. The saclike membranes that make up grana are known as thylakoids.Click to see full answer. Just so, what is a Granum in biology?Definition. noun, plural: grana. The collective term for the stack of thylakoids within the chloroplast of plant cells. Supplement. The granum contains the light harvesting system composed of chlorophyll and phospholipids.Additionally, what is Grana function? Grana (plural of ‘granum’) are stacks of structures called thylakoids, which are little disks of membrane on which the light-dependent reactions of photosynthesis take place. Stacked into grana, the shape of the thylakoids allow for optimum surface area, maximizing the amount of photosynthesis that can happen. Also to know, what is the definition of stroma in biology? Stroma, in botany, refers to the colorless fluid surrounding the grana within the chloroplast. Within the stroma are grana, stacks of thylakoid, the sub-organelles, the daughter cells, where photosynthesis is commenced before the chemical changes are completed in the stroma. Photosynthesis occurs in two stages.What is the definition of Thylakoid in biology?thylakoid. noun. A saclike membrane in the chloroplasts of plant cells that is often arranged in stacks called grana and that is the site of the light reactions of photosynthesis.
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