Question

The Grana and Stroma are the parts of which cell organelles

• A. Mitochondria
• B. Chloroplast
• C. Ribosome
• D. Golgi bodies

Answer 1

The correct option is B Chloroplast

Chloroplasts are present in higher plants. They contain a pigment chlorophyll and are involved in photosynthesis. Each chloroplast is bounded by two unit membranes and shows two distinct regions.:

1. Grana are stacks of membrane bounded, flattened discoid sacs called thylakoids containing the molecules of chloro[hyll. They are the main functional units of chloroplasts.

2. Stroma is the homogenous matrix in which grana are embedded. Stroma contains a variety of photosynthetic enzymes, starch grains, DNA and ribosomes.

Granum is the site of light reaction during photosynthesis while stroma is the site of dark reaction.

Thus, the correct answer is option B.