Question

The site of photosynthesis is

A. D
B. A
C. C
D. B

Answer 1

Hint: A process carried out by plants and few organisms that makes use of carbon dioxide, sunlight, and water to prepare food is called photosynthesis. The process of photosynthesis is carried out by autotrophs which prepare their own food and do not feed on another microorganism.

Complete answer: The process of photosynthesis involves the conversion of light energy into chemical energy that can be later used as a fuel to carry out organisms activities. The product of photosynthesis is a six-carbon glucose sugar which is used to provide two important resources to organisms such as energy and fixation of carbon. The process of photosynthesis takes place in a special cell organelle called the chloroplast. Since the organelle has its own genetic material DNA and hence can synthesize its own proteins. In the above-given diagram, label A is the upper epidermis and label B is the palisade mesophyll which together forms the dermal tissue of the leaf. The guard cells present in the lower epidermis of the leaf regulate the function of opening and closing of the stomata which is present in the lower epidermis. Photosynthetic pigment known as chlorophyll is present in the palisade parenchyma and mesophyll cells of the lower epidermis. The vascular bundles are shown by label C and the mesophyll cells are labelled as D. The stomata is shown by label E. Therefore, label D that is mesophyll cells which contain chlorophyll is the site of photosynthesis.
So, option A is the correct answer.

Note: The photosynthetic pigments not only provide colour to the organisms but also play an important role in the trapping of the sunlight. The various important pigments involved in the process of photosynthesis are chlorophyll, carotenoids, and phycobilin.