the process and site of the Krebs cycle

Question 1

where does the Krebs cycle occur?

Answer 1

in mitochondrial matrix

Question 2

outline the process of the Krebs cycle

Answer 2

1. acetyl group from acetyl CoA combines with oxaloacetate (4C) to form a Citrate (6C)
2. citrate is decarboxylated and dehydrogenated to produce a 5C compound and one molecule of CO2 and a molecule of NADH
3. 5C compound is then decarboxylated and dehydrogenated to produce a 4C compound and one molecule of CO2 and one molecule of NADH
4. substrate level phosphorylation occurs to the 4C compound and one molecule of ATP is produced
5. 4C compound is dehydrogenated to produce another 4C compound and a molecule of reduced FAD (FADH2)
6. the compound then rearranges by an isomerase enzyme and dehydrogenation to become a compound of oxaloacetate
7. cycle repeats twice for each glucose molecule

Question 3

what is produced in the krebs cycle?

Answer 3

6NADH
2FADH2
4CO2
2ATP

Question 4

what is reduced NAD and FAD used for?

Answer 4

they will carry the hydrogen atoms to the electron transport chain on the cristae