Question

The light is trapped by photosynthetic pigments presents in the

• A. Stroma
• B. Grana
• C. Quantosomes
• D. Periplastidial space

Answer 1

Answer: (B)

Grana

The chloroplast is the cell organelles present in plant cells that are responsible for initiating the process of photosynthesis. Chloroplasts are double-membrane bound structures. The stroma of chloroplast is the jelly-fluid like structure in which another membrane system is presently called the thylakoids. These thylakoids are stacked upon each other to form the structure called grana. The grana are connected with each other by an extension of thylakoids called stroma lamellae. Thylakoid of grana has the photosynthetic pigments embedded in it that perform the trapping of sunlight and begin the light reaction of the photosynthesis.

A. Stroma is the region where the dark reaction of the photosynthesis occurs.

B. Grana is the region where the light reaction occurs through the trap of light by the photosynthetic pigment.

C. Quantasomes are the photosynthetic units made of pigments and are present in the grana.

D. Periplastidial space is the region between the inner membrane and the outer membrane of the plastids.

Hence, the correct answer is 'Grana'