ATP
- Created by: iloverevision:)
- Created on: 06-03-19 12:22
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- ATP
- Why is energy important?
- plant & animal cells need energy for biological processes to occur
- Adenosine triphosphate
- plant & animal cells release energy from glucose - respiration
- cell can't get energy directly from glucose
- so in respiration, the energy from glucose is used to make ATP
- cell can't get energy directly from glucose
- made from nucleotide base adenine, combined with ribose sugar & 3 phosphate groups
- known as nucleotide derivative - modified form of nucleotide
- once made - diffuses to part of cell that needs energy
- energy stored is in high energy bonds between phosphate groups
- released via hydrolysis reactions
- plant & animal cells release energy from glucose - respiration
- Making & using ATP
- when energy is needed by cell, ATP is broken down into ADP & Pi (inorganic phosphate)
- hydrolysis reaction
- phosphate bond broken & energy released
- reaction is catalysed by enzyme ATP hydrolase
- ATP hydrolysis can be coupled to other energy-requiring reactions in cell - means energy released can be used directly to make coupled rreaction happen, rather than being lost as heat
- released inorganic phosphate can be put to use
- can be added to another compound (phosphorylation) which often makes compound more reactive
- hydrolysis reaction
- ATP can be resynthesised in condensation reaction between ADP & Pi
- happens during both respiration & photosynthesis & is catalysed by enzyme ATP synthase
- when energy is needed by cell, ATP is broken down into ADP & Pi (inorganic phosphate)
- Why is energy important?
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