Question

The chlorophyll in the chloroplast is located in
A. Grana.
B. Pyrenoids.
C. Stroma.
D. Both grana and stroma.

Answer 1

Hint: The chlorophyll in the chloroplast is located in the double membranous structure that surrounds the chloroplast. It is a major site of photosynthesis in plants and some autotrophic algae. Structurally they are connected by stroma thylakoids or lamellae.

Complete answer:
The chloroplast is a cell organelle and is categorized under plastids that consist of chlorophyll i.e. green pigment. Pigment consists within the thylakoid membranes of the chloroplast. Thylakoid is a membrane-bound section that is present within the chloroplasts of a cell. It is the major site, where light-dependent reaction of photosynthesis occurs. Thylakoid is made up of a thylakoid membrane that encloses the lumen part of the thylakoid. Thylakoids are disc shaped and a single stack of thylakoid discs arrangement or lamella is called a grana.
Chlorophyll is the pigment that helps in trapping of light for photosynthesis to occur. It is found in the chloroplast of green plants. Therefore, it is the grana that consists of light trapping pigment chlorophyll and thus grana is the site of light reaction of photosynthesis. This green pigment chlorophyll is present and found within the thylakoid membrane, and the viscous space between the thylakoids and the chloroplast membranes is known as stroma.

Hence, the correct answer is option (A).

Note:
-In all the chloroplasts three membranous structures are present. First is the outer chloroplast membrane, second is the thylakoid system and the last is the inner chloroplast membrane.
-Stroma is the grounded substance in the chloroplast wherein, the thylakoids are embedded in the stroma. It contains the enzymes and the dark reaction of the photosynthesis occurs in stroma.