ATP function and structure
- ATP is made up of a ribose sugar, a phosphate and an adenine.
- It is synthesised from ADP and an inorganic phosphate.
- ATP diffuses into the part of the cell that needs energy.
- It is broken back down into ADP and an inorganic phosphate. The chemical energy that is released is used by the cell.
- The reaction is catalysed by ATPase
ATP is a good energy source for many reasons:
- No energy is wasted: only a small manageable amount stored
- Small soluble molecule that is easily transported
- Easily broken down
- Energy can be transferred to another molecule by a phosphate group transfer
- It can't pass out of the cell
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NADP overview and role
- Transfers hydrogen from one molecule to another (it can reduce or oxidise a molecule)
- It supplies the hydrogen needed to make glucose in the Light-Independent reaction.
- Reduced NADP is generated with a proton from the stroma and the electrons from the end of the electron chain.
- Reduced NADP is recycled to NADP
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- Transfers acetate between molecules
- It is involved in respiration
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