Question

Ju h en and adus a feeling of 3. Please describe the 4 steps of cellular respiration described in the Learn Ahead Videos and notes des 1. Glycolysis (4 pts) 2. Formation of acetyl COA 3. Krebs cycle 4. Oxidative phosphorylation

Answer 1

Glycolysis: Conversion of glucose to two pyruvate molecules
Link reaction: Pyruvate ------> Acetyl CoA
TCA cycle: Acetyl COA --------> CO2
Oxidative phosphorylation: Proton gradient is established across the inner mitochondrial membrane which is coupled to ATP synthesis.

1 NADH = 2.5 ATP
1 FADH2 = 1.5 ATP

(Some books give NADH = 3 ATP and FADH2 = 2 ATP)

Aerobic respiration: C6H12O6 + 602 ---------> 6CO2 + 6H2O Molecules in Glucose 2 NAD+ 2 ADP + Pi Process Glycolysis: Prokaryotes: Cytosol Eukaryotes: Cytosol Molecules out 2 Pyruvate molecules 2 NADH 2 ATP 2 Pyruvate 2 NAD+ 2 COA Transition reaction: Prokaryotes: Cytosol Eukaryotes: Mitochondrial matrix 2 Acetyl COA 2 NADH 4 CO2 TCA cycle: Prokaryotes: Cytosol Eukaryotes: Mitochondrial matrix 2 Acetyl COA 2 GDP 6 NAD+ 2 FAD+ 10 NADH 2 FADH2 28 ADP + Pi 6 02 4 CO2 2 GTP 6 NADH 2 FADH2 10 NAD+ 2 FAD+ 28 ATP 6 H2O ETC: Prokaryotes: Plasma membrane Eukaryotes: Inner mitochondrial membrane