During photosynthesis, light energy from the sun is absorbed by:

a)
Mitochondria
b)
Guard cell
c)
Chlorophyll
d)
Stomata
Correct answer is option 'C'. Can you explain this answer?

Question

During photosynthesis, light energy from the sun is absorbed by:a)Mitochondriab)Guard cellc)Chlorophylld)StomataCorrect answer is option 'C'. Can you explain this answer?

Answer

It is called light phase or photochemical reaction in which two step occur1.absorbtion of sunlight by chlorophyll and then conversion of radiant energy into chemical energy into ATP and NADPH as assimilatory power2.photolysis of water

Answer

Absolutely option c is correct because,
It has been found that chloroplast is a membranous structure consisting of 3 membraneous. The third layer forms stacked sac like structures called as granum .It is believed to be a site for trapping of solar energy.
The substances found in chloroplast which capture sunlight are called photosynthetic pigments.
https://goo.gl/images/bWYIoU( structure of chloroplast)

Answer

During photosynthesis, light energy from the sun is absorbed by chlorophyll.

Chlorophyll:
Chlorophyll is a pigment found in the chloroplasts of green plants and algae. It is responsible for capturing light energy from the sun and converting it into chemical energy during the process of photosynthesis. Chlorophyll molecules are located in the thylakoid membranes of the chloroplasts.

Process of Photosynthesis:
Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy to produce glucose and oxygen. It can be divided into two main stages: light-dependent reactions and light-independent reactions.

1. Light-Dependent Reactions:
During the light-dependent reactions, light energy is absorbed by chlorophyll and other pigments. The absorbed light energy excites electrons in the chlorophyll molecules, which are then transferred through a series of electron carriers in the thylakoid membrane. This electron transfer generates ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which are energy-rich molecules used in the next stage.

2. Light-Independent Reactions:
The light-independent reactions, also known as the Calvin cycle, occur in the stroma of the chloroplasts. In this stage, the ATP and NADPH produced in the light-dependent reactions are used to convert carbon dioxide into glucose. This process involves a series of chemical reactions, including the fixation of carbon dioxide, reduction of carbon compounds, and regeneration of the starting molecule.

Importance of Light Energy:
Light energy is essential for photosynthesis as it provides the initial energy source for the process. The chlorophyll molecules in the chloroplasts absorb specific wavelengths of light, mainly in the blue and red regions of the electromagnetic spectrum. This absorbed light energy is used to power the conversion of carbon dioxide and water into glucose and oxygen.

Other Options:
a) Mitochondria: Mitochondria are organelles responsible for cellular respiration, which is the process of converting glucose and oxygen into ATP. They are not directly involved in photosynthesis.
b) Guard Cell: Guard cells are specialized cells found in plant leaves that control the opening and closing of stomata, which are small pores used for gas exchange. They do not absorb light energy during photosynthesis.
d) Stomata: Stomata are small openings on the surface of leaves that allow the exchange of gases, such as carbon dioxide and oxygen. They do not absorb light energy during photosynthesis.

Therefore, the correct answer is option 'C' - Chlorophyll.

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