Question

WHAT IS CHLROPHYLL?
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Answer 1

a green pigment, present in all green plants and in cyanobacteria, which is responsible for the absorption of light to provide energy for photosynthesis

Answer 2

Answer:

Chlorophyll is a light-absorbing pigment, and it actually gets its green color because it absorbs blue and red wavelengths of light. The green wavelengths are reflected, giving that unmistakable color to plants. Since it is a light-absorbing pigment, chlorophyll is called a photoreceptor. Also note that there are two types of chlorophyll: chlorophyll a and chlorophyll b.

Function

Chlorophyll molecules are contained inside chloroplasts, which are the food producers of the cell found in all green parts of a plant. Inside the chloroplasts, we also find thylakoid membranes, which contain photosystems. Photosystems are made of a group of light-harvesting complexes, which is just a fancy term for pigment molecules and proteins. Two photosystems have been identified: photosystem I and photosystem II.

The chlorophyll molecules are arranged in and around the photosystems, and this allows them to transfer the light energy into the center of the photosystem. This light energy comes from photons. Photons are one way that light travels, as discrete packets of energy.

When light energy is passed by chlorophyll molecules to the center of photosystem II (the first photosystem in the chain), it energizes a central chlorophyll molecule called P680. This molecule is so energized that it is passed along another chain to photosystem I. It is then sent to the central chlorophyll molecule there: P700. This process, called photosynthesis, is how plants convert sunlight into usable chemical energy.

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