Question

Light energy is converted into chemical energy in the presence of
A. Pyrenoids
B. Chloroplasts
C. Ribosomes
D. Mesosomes

Answer 1

Hint: Plants make their food in the leaves with the help of sunlight. They convert the sunlight (light energy) into chemical energy. This process is called photosynthesis. For the occurrence of this process, photosynthesis requires various pigments or subunits which will sum up the whole work.

Complete answer:
Photosynthesis is the process of making glucose in the presence of sunlight. This process occurs in the chlorophyll present in the plastids. The photosynthesis process is done by absorbing the sunlight and converting it into chemical energy. Water is very essential for this process, as it is involved in the release of oxygen as the byproduct. Photosynthesis is divided into two reactions; the light-dependent reactions and the light-independent reactions. In light-dependent reactions, plant harvest energy that is required for the light-independent phase, whereas, in light-independent reactions, plants fix carbon dioxide from the atmosphere, as a result of which glucose is formed as the product. The whole process occurs in the chloroplast of a plant cell. Photosynthesis occurs in plants and in some algae.
i. Pyrenoids: Pyrenoids are extensively scattered in the cytoplasm to store the food. They are subcellular parts of the chloroplast.
ii. Ribosomes: They are present both in prokaryotes and eukaryotes as they make the proteins which are mandatory for cell functioning.
iii. Mesosomes: Mososomes are present in bacterias. They increase the bacterial surface for respiration. They play a vital role in the cellular processes and cell wall division.
Hence, the correct answer is Option (B).

Note: Chloroplast is organelle specialized in the food making organisms. They have photosynthetic pigments where the whole process of capturing light and energy takes place. This organelle was discovered by Sachs. They are oval disc-shaped. They have a green colour which differentiates them from other plastids.