Question

Identify the structures present in the following image.

• A. (i)-inner membrane, (ii)-lumen, (iii)-thylakoid, (iv)-oxysomes
• B. (i)-outer membrane, (ii)-stroma, (iii)-thylakoid, (iv)-granum
• C. (i)-inner membrane, (ii)-intermembrane space, (iii)-thylakoid, (iv)-oxysomes
• D. (i)-outer membrane, (ii)-lumen, (iii)-thylakoid, (iv)-stromal lamella

Answer 1

The correct option is B (i)-outer membrane, (ii)-stroma, (iii)-thylakoid, (iv)-granum

The image given is that of the chloroplast. It is a green coloured plastid that takes part in the synthesis of carbohydrates. The chloroplast is a double membraned organelle having an outer membrane and inner membrane. The space enclosed by the inner membrane is called the stroma. The stroma shows the presence of flat disk-like sacs called thylakoids. The thylakoids are arranged in a stack-like fashion one above another. These piled thylakoids are collectively called grana. The thylakoids of different grana are connected by tubules called stromal lamellae.