Introduction to Metabolism Flashcards
What type of reaction happens when Keq is greater than one?
Exergonic
free energy is negative
(T/F) In thermodynamics we are concerned with the rate of the process
False, energy differences between initial and final state
Not with the rate of process
A more negative reduction potential will have more or less energy?
More energy (donor)
The ETC is the transfer of electrons from what compound to what terminal acceptor?
NADH and FADH2
Oxygen
The ETC operates in what kind of fashion?
A step wise fashion
Going from more negative electron carriers to more positive
Where does ETC take place in prokaryotes and eukaryotes?
P: plasma membrane
E: mitochondrial internal membrane
When electrons are transported there is always a redox or oxidation reaction?
Redox
How many protons does it take to create one ATP?
Four protons
Enzymes
- increases
- does not alter
- lowers
Increases rate of reaction
Does not alter equilibrium constant
Lowers activation energy
Many proteins are composed of only what?
Proteins
What does a low Km mean for the affinity for the substrate?
Increased affinity for the substrate
What are three reversible enzyme reactions?
- Feedback inhibition
- Allosteric regulation
- Covalent modification
What is the name of the site where the substrate binds on the enzyme?
Catalytic site
What is the difference between competitive and noncompetitive inhibition?
Non: binds to site other than active site
Comp: competes with substrate for active site
