Q. No.Pyruvate dehydrogenase activity during aerobic respiration requires:
1.
Calcium
2.
Iron
3.
Cobalt
4.
Magnesium
The enzyme lactate dehydrogenase catalyses:
1. the oxidation of pyruvate to lactate to regenerate NAD+.
2. the reduction of pyruvate to lactate to regenerate NAD+.
3. the reduction of pyruvate to lactate to regenerate NADH.
4. the oxidation of pyruvate to lactate to regenerate NADH.
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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. |
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For aerobic cellular respiration, identify the correctly matched row:
|
Phase |
Cost,per glucose |
Gain,per glucose |
|
|
1. |
Glycolysis |
2 ATP |
4 ATP, 1 NADH |
|
2. |
Oxidation of pyruvic acid |
4 ATP |
2 NADH |
|
3. |
Krebs cycle |
2 ATP |
2 ATP, 6 NADH, 1 FADH2 |
|
4. |
Electron transport |
2 ATP |
34 ATP |
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The electron transport system [ETS] in mitochondria is present in:
1. The outer membrane
2. The inner membrane
3. Inter-membrane space
4. Matrix
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How many molecules of ATP are directly synthesized in the glycolysis pathway from one glucose molecule?
| 1. | 2 | 2. | 4 |
| 3. | 6 | 4. | 10 |
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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
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 lactate fermentation, the final electron acceptor is:
| 1. | NAD+ | 2. | pyruvate |
| 3. | O2 | 4. | lactic acid |
The glycolytic pathway occurs in:
1. cytoplasm
2. chloroplasts
3. matrix of the mitochondrion
4. cristae of the mitochondrion
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