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
In which one of the following do the two names refer to one and the same thing : -
1. Krebs cycle and Calvin cycle
2. Tricarboxylic acid cycle and citric acid cycle
3. Citric acid cycle and Calvin cycle
4. Tricarboxylic acid cycle and urea cycle
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. |