Pyruvic acid, the key product of glycolysis, can have many metabolic fates. Under aerobic condition, it forms
1. lactic acid
2. CO2 + H2O
3. acetyl Co-A+ CO2
4. ethanol + CO2
Mitochondria are called powerhouses of the cell. Which of the following observations support this statement?
1. | Mitochondria synthesise ATP |
2. | Mitochondria have a double membrane |
3. | The enzymes of the Krebs’ cycle and the cytochromes are found in mitochondria. |
4. | Mitochondria are found in almost all plants and animal cells. |
Match the following columns.
Column I |
Column II |
A. Molecular oxygen B. Electron acceptor C. Pyruvate dehydrogenase D. Decarboxylation |
1. - ketoglutaric acid 2. Hydrogen acceptor 3. Cytochrome-c 4. Acetyl Co - A |
Codes
Options: | A | B | C | D |
1. | 2 | 3 | 4 | 1 |
2. | 3 | 4 | 2 | 1 |
3. | 2 | 1 | 3 | 4 |
4. | 4 | 3 | 1 | 2 |
Apples are generally wrapped in waxed paper to
1. | prevent sunlight for changing its colour |
2. | prevent aerobic respiration by checking the entry of oxygen |
3. | prevent ethylene formation due to injury |
4. | makes the apples look attractive |