| chloroplast | Photosynthetic organelle of higher plants. Lens shaped and rather variable in size but approximately 5m long. Surrounded by a double membrane and contains circular DNA though not enough to code for all proteins in the chloroplast). Like the mitochondrion, it is semi autonomous. It resembles a cyanobacterium from which, on the endosymbiont hypothesis, it might be derived. The photosynthetic pigment, chlorophyll, is associated with the membrane of vesicles (thylakoids) that are stacked to form grana. (18 Nov 1997) |
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| chloroplast DNA | <molecular biology> A circular molecule of DNA found in all photosynthetic plants which codes for the function of photosynthesis. (09 Oct 1997) |
| chloroplasts | Plant cell inclusion bodies that contain chlorophyll. They occur in cells of leaves and young stems. (12 Dec 1998) |
| RNA, chloroplast | Ribonucleic acid in chloroplasts having regulatory and catalytic roles as well as involvement in protein synthesis. (12 Dec 1998) |
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| DNA, chloroplast | Deoxyribonucleic acid that makes up the genetic material of chloroplasts. (12 Dec 1998) |