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9 Cards in this Set
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what is metabolism?
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the coupling of anabolic and catabolic processes
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anabolic. .
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-builds molecules up
-requires energy source -sometimes requires reducing agent (H) -reduce |
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catabolic
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-breaks molecules down
-generates energy (NB not all energy generated is captured as ATP) -oxidises (can capture reducing power too) -generates reductant |
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what are some examples of macromolecules?
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proteins, fats, nucleic acids, polysaccharides
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what are macromolecules assembled from?
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'building blocks' eg amino acids, simple sugars, fatty acids etc
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what does ATP stand for?
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adenosine triphosphate (adenine, ribose, 3 phosphates)
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is ATP stable?
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thermodynamically unstable (lots of energy), but kinetically very stable, has to overcome a high Ea in order to hydrolyse, an enzyme is required
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how does ATP generate energy?
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when it hydrolyses (between phosphate groups) energy is released as heat
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how is ATP controlled by enzymes?
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in order to hydrolyse a high Ea needs to be overcome which requires an enzyme. therefore release of energy can be completely controlled by enzymes which makes ATP very useful.
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