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Chloroplast and Chlorophyll

Chloroplasts are organelles found in plant cells in order for photosynthesis to take place. Chloroplasts contain a green pigment called chlorophyll that absorbs sunlight which is used to break down CO2 and H2O into glucose and oxygen.

Chloroplasts are covered by a double membrane structure called chloroplast envelope; the internal membrane of the chloroplast is called grana -where the light dependent reaction takes place. A single grana is made up of a layer of discs known as thylakoid membrane.

The membrane layers are surrounded by a matrix called stoma and this is where the light independent reaction takes place.

Chlorophyll is the major adaptation of chloroplasts. It’s a light capturing molecule. It’s a mixture of different components such as: chlorophyll “A” (blue green), chlorophyll “B” (yellow green), and carotenoids (orange yellow).

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