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Describe the structure of chroloplast |
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Answer» A jelly like substance between the cell wall and nucleus Chloroplasts are found in all higher plants. They are oval or biconvex\xa0shaped, cell organelles\xa0found within the mesophyll of the plant cell. The size of the chloroplasts organelle usually varies between 4-6 µm in diameter and 1-3 µm in thickness. They are double-membrane organelle with the presence of outer, inner and the thin intermembrane space present in between the two layers. There are two distinct regions present inside the chloroplasts and are called as the grana and stroma.\tGrana is made up of stacks of disc-shaped structures known as thylakoids.\xa0The\xa0grana\xa0of the chloroplast consist of chlorophyll pigments and are the functional units of chloroplasts.\tStroma is the homogenous matrix\xa0which contains grana and is similar to the cytoplasm in cells in which all the organelles are embedded. Stroma also contains various enzymes, DNA, ribosomes, and other substances. Stroma lamellae function by connecting the stacks of thylakoid sacs. |
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