L23 Metabolism Flashcards
Metabolism is comprised of two types of reaction…
Catabolic and anabolic
Catabolic reactions ( break down / build up )…
Catabolic reactions break down
Anabolic reactions ( break down / build up)…
Anabolic reactions build up
Catabolic reactions are energy…
Producing
Anabolic reactions are energy…
Consuming
Anabolic reactions tend to be ( reductive / oxidative )…
Reductive
Energy demand is continuous, but energy intake is quantised, therefore…
Energy storage is required
Catabolic reactions tend to be (reductive / oxidative )…
Oxidative
Gibbs free energy
ΔG = ΔH - TΔS
-ΔG reactions are known as…
Exergonic
+ΔG reactions are known as…
Endergonic
Endergonic reactions require energy input to ‘go’. How does the body achieve this:
a) increasing temperature
b) increasing substrate concentration
c) linking to a favourable (exergonic) reaction
d) all of the above
c) linking to a favourable (exergonic) reaction
An energy currency is needed because favourable and unfavourable reactions that need to be ‘linked’ do not occur in the…
Same place
The energy contained within glucose molecules must be release in a…
Stepwise process
The bonds between the outer two phosphates attached to ATP are ( higher / lower / the same ) energy level as the bond that joins the first phosphate to the sugar.
Higher
