8.3

Question 1

Pyruvate oxidation during aerobic respiration

Answer 1

Occurs in
-mitochondrial matrix of eukaryotes
-plasma membrane of prokaryotes
-catalyzed by private dehydrogenase

Question 2

Each pyruvate is used to generate

Answer 2

1 CO2
1 NADH
1 acetyl-CoA

Question 3

Krebs cycle

Answer 3

-Oxidizes the acetyl group generated by pyruvate oxidation
-Occurs in the matrix of the mitochondria
-Pathway of 9 steps divided into 3 parts

Question 4

9 steps into 3 parts Krebs cycle

Answer 4

1. Acetyl-CoA + oxaloacetate -> citrate
2. Citrate rearrangement and decarboxylation (2 CO2 released)
3. Regeneration of oxaloacetate

Question 5

Krebs cycle for each Acetyl-CoA entering

Answer 5

-release 2 molecules of CO2
-reduce 3 NAD+ to 3 NADH
-reduce 1 FAD (electron carrier) to FADH2
-produce 1 ATP
-regenerate oxaloacetate