Question

If thylakoids are removed and kept in a culture medium containing $C{O}_2$ and $H_{2}O$ and the set up is exposed to light, hexose sugars are not formed as the end product. The most appropriate reason for this is that

• A. Carbon assimilation cannot take place.
• B. The pigments are not linked.
• C. Enzymes are not available.
• D. The light trapping device is non-functional.

Answer 1

Answer: (A)

Carbon assimilation cannot take place.

Chloroplasts are found in the cytoplasm of plant cells. These flat, Frisbee-shaped structures are filled with thylakoids which are composed of membranes which are the sites of sunlight-dependent photosynthesis. If these thylakoids are removed and kept in a cultured medium of CO${}_2$ and H${}_2$O and exposed to sunlight , still hexose sugars are not formed as end products. This is because the carbon assimilating enzymes are absent