What Is A Chloroplast?

It is important to their photosynthesis

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A chloroplast is an organelle found only in plant cells. Chloroplasts are the site of photosynthesis in the plant cell. They contain the green pigment that causes plants and leaves to look green.

Each chloroplast is tiny, only a few micrometers wide. A typical plant cell contains about 30 chloroplasts, but some cells, such as those at the surface of a leaf, can have more.

The chloroplast has a complex internal structure. It has its own lipid bilayer membrane and contains stacks of internal membranes called grana (singular granum). These stacks contain individual units called thylakoids. The membranes within the thylakoids contain the molecules that capture light energy from sunlight for use in photosynthesis.

The energy is absorbed and passed on through a series of chemical reactions and is used to power reactions in the stroma (the space between the grana) that build sugars from carbon dioxide and water. This overall reaction, is photosynthesis and it is the source of all the food energy that exists on Earth.

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Chloroplast is when light energy is converted to chemical energy in the form of sugar= glucose. Chloroplast is found in plant cells.

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