Question

Which of the following about chloroplast is incorrect?

• A. Chloroplasts have an inner and outer membrane
• B. Chloroplasts contain stacks of thylakoids called grana
• C. Chloroplasts don’t contain any ribosome
• D. Chloroplast contains pigments like chlorophyll a and chlorophyll b

Answer 1

The correct option is C Chloroplasts don’t contain any ribosome

Chloroplasts in plants are large organelles that are bound by a double membrane (inner and outer membrane) called the chloroplast envelope. The inner membrane encloses a fluid called the stroma. In the stroma, there are disc-shaped structures called thylakoids. These thylakoids are stacked upon one another to form the granum. Thylakoids are the site of the light-dependent reactions. Chloroplast also contains some light-absorbing pigments called chlorophyll a, chlorophyll b, carotenoids, and xanthophylls to aid the process of photosynthesis. The chloroplast is a semi-autonomous organelle, as it has its own DNA and ribosomes. Thus, they are capable of making their own proteins. Hence, the option (c) is incorrect.