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9 Cards in this Set

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