Refer to the given diagrammatic representation of an electron micrograph of a section of chloroplast

Question

Refer to the given diagrammatic representation of an electron micrograph of a section of chloroplast. Select the option which correctly depicts the functions of parts $X, Y$ and $Z$.

Professor PC Thomas Classes · Answer

(b) : Light reactions (or photochemical phase) of photosynthesis mainly occur in the grana thylakoids. Dark reactions (or biosynthetic phase) which involve synthesis of carbohydrates by $\mathrm{CO}_{2}$ fixation, occur in the stroma (or matrix) of chloroplasts. The chloroplast matrix of higher plants stores starch temporarily in the form of starch granules.