overview of catabolism

Question 1

aerobic respiration

Answer 1

Glycolysis:
yields NADH and 2 ATPs

Krebs Cycle:
yields NADH, FADH2, CO2, 2 ATPs/GTPs

Electron Transport System:
yields variable amount of energy, using O2 as electron acceptor

max net yield: 36-38 ATPs

Question 2

anaerobic respiration

Answer 2

Glycolysis:
yields NADH, 2 ATPs

Krebs Cycle:
yields NADH, FADH2, CO2, 2 ATPs

Electron Transport System:
yields variable amount of energy
using non-O2 compound as electron acceptor (SO4 ^-2, NO3^-, CO3 ^-2

max net yield: 2-36 ATPs

Question 3

fermentation

Answer 3

Glycolysis:
yields NADH, 2 ATPs

Fermentation:
using organic compounds as electron acceptor
yields variable amount of energy

Alcohols, acids

max net yield: 2 ATPs