Ch 3 - Cell Metabolism Flashcards
Metabolism is equal to …
anabolism
+
catabolism
Catabolic pathway does what?
breaks molecules down into:
- building blocks
- heat loss
- useful forms of energy
Anabolic pathway does what?
builds building blocks back up to molecules that form cells
_______ reactions release energy
Exergonic
_______ reactions require energy
Endergonic
Exergonic reactions have a _____ ∆E
negative
Endergoinc reactions have a _____ ∆E
positive
Catabolic reactions are _____ reactions
exergonic
Anabolic reactions are _____ reactions
endergonic
Energy is captured and stored as ATP in what type of reactions?
catabolic/exergonic reactions
ATP generated is used to drive what kinds of reactions?
anabolic/endergonic reactions
What types of chemical reactions are there?
- condensation and hydrolysis
- oxidation-reduction (redox)
- phosphorylation and dephosphorylation
hydrolysis is an anabolic or catabolic reaction
catabolic
condensation is an anabolic or catabolic reaction
anabolic
Oxidation is gain or loss of H atoms?
loss
OIL
Reduction is loss or gain of H atoms?
gain
RIG
Dephosphorylation is what?
removal of phosphate group
Phosphorylation is what?
addition of a phosphate group
Changing the direction of a reaction happens by what?
changing the reactant or product concentrations
What is active energy?
extra energy that molecules must acquire in order to react
Catalysts do what?
speed up the rate of reactions by decreasing the activation energy
What are cofactors?
inorganic metal ions
What do cofactors do?
affect the active site’s shape
What are coenzymes?
organic cofactors (B vitamins)
