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Stroma, in botany, refers to the colorless fluid surrounding the grana within the chloroplast. [ 1 ] Within the stroma are grana (stacks of thylakoid ), the sub-organelles where photosynthesis is started [ 2 ] before the chemical changes are completed in the stroma.
In this scenario, the stroma become corrupted by cancer cells and turn into factories for the synthesis of energy rich nutrients. The cells then take these energy rich nutrients and use them for TCA cycle which is used for oxidative phosphorylation. This results in an energy rich environment that allows for replication of the cancer cells.
A biogeochemical cycle, or more generally a cycle of matter, [1] is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust. Major biogeochemical cycles include the carbon cycle, the nitrogen cycle and the water cycle. In each cycle, the chemical element or molecule is ...
The Calvin cycle is present in all photosynthetic eukaryotes and also many photosynthetic bacteria. In plants, these reactions occur in the stroma, the fluid-filled region of a chloroplast outside the thylakoid membranes. These reactions take the products (ATP and NADPH) of light-dependent reactions and perform further chemical processes on them.
The enzyme is integrated into thylakoid membrane; the CF 1-part sticks into stroma, where dark reactions of photosynthesis (also called the light-independent reactions or the Calvin cycle) and ATP synthesis take place. The overall structure and the catalytic mechanism of the chloroplast ATP synthase are almost the same as those of the bacterial ...
The electron transfers from pheophytin to plastoquinone (PQ), which takes 2e-(in two steps) from pheophytin, and two H + Ions from the stroma to form PQH 2. This plastoquinol is later oxidized back to PQ, releasing the 2e - to the cytochrome b 6 f complex and the two H + ions into the thylakoid lumen .