The enzyme, decarboxylase, catalyses the following step :
1. conversion of citric acid to cis aconitic acid
2. fumaric acid to malic acid
3. oxalosuccinic acid to -ketoglutaric acid
4. malic acid to oxaloacetic acid
The number of molecules of carbon dioxide produced by three turns of the Krebs cycle would be:
1. | 3 | 2. | 6 |
3. | 12 | 4. | 18 |
Coenzyme A, formed in part from one of the B vitamins, functions to:
1. | Oxidize pyruvate | 2. | Reduce pyruvate |
3. | Activate the acetyl group | 4. | Facilitate electron flow |
In the citric acid cycle, a molecule of GTP is formed during the conversion of:
1. - ketoglutarate to Succinyl-CoA
2. Succinyl-CoA to succinate
3. Succinate to fumarate
4. Fumarate to malate
In the citric acid cycle:
1. | oxygen is used to oxidise the acetyl group carbons of acetyl-CoA in the citric acid cycle. |
2. | three molecules of NADH and one molecule of FADH2 are produced in one turn. |
3. | oxygen is not used, so the cycle can occur in anaerobic conditions. |
4. | water is formed during the complete oxidation of glucose. |