Q. No.Cellular respiration includes:
I: Transport of gases from the respiratory surface to the cells
II. Breakdown of food material within the cell to release energy
III. Trapping of energy released during the breakdown of food material within the cell for synthesis of ATP
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
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Consider the two statements:
Statement I: Inside a cell, the glucose molecule is oxidised not in one step but in several small steps.
Statement II: Some steps will be just large enough such that energy liberated can be coupled to ATP synthesis.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
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1. during conversion of 1,3 biphosphoglyceric acid to 3-phosphoglyceric acid and during conversion of phosphoenolpuruvate to pyruvic acid
2. during conversion of glucose to glucose-6-phospate and during conversion of fructose-6-phosphate to fructose – 1,6- biphosphate
3. during conversion of glucose to glucose-6-phospate and during conversion of glucose-6-phosphate to fructose-6- phosphate
4. during conversion of 3-phosphoglyceric acid to 2-phosphoglycerate and during conversion of 2-phosphoglycerate to phosphoenolpuruvate
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1. during conversion of 1,3 biphosphoglyceric acid to 3-phosphoglyceric acid
2. during conversion of glyceraldehyde -3-phosphate to 1,3 biphosphoglyceric acid
3. during conversion of glucose to glucose-6-phospate
4. during conversion of 3-phosphoglyceric acid to 2-phosphoglycerate
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Consider the given statements:
| Statement I: | In alcohol fermentation in yeast, pyruvic acid decarboxylase and alcohol dehydrogenase convert pyruvic acid to carbon dioxide and ethanol. |
| Statement II: | In lactic acid fermentation, lactate dehydrogenase reduces pyruvic acid to lactic acid and carbon dioxide in muscle cells during exercise. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
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| 1. | Eight molecules of NADH + H+ |
| 2. | Two molecules of FADH2 |
| 3. | Two molecules of ATP |
| 4. | Four molecules of carbon dioxide |
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| Respiratory Complex | Pathway for electron transport | |
| 1. | NADH dehydrogenase | NADH – FMN – [Fe-S] – Q |
| 2. | Succinic dehydrogenase | FADH2 – FMN - Q |
| 3. | Cytochrome bc1 | Cyt b – [Fe-S] – Cyt c1 |
| 4. | Cytochrome c oxidase | CuA – Cyt a – Cyt a3 – CuB |
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| Fermentation | Aerobic respiration | |
| I. | Partial breakdown of glucose | Complete breakdown of glucose |
| II. | Net gain of only two molecules of ATP beginning with one molecule of glucose | Net gain of many more molecules of ATP beginning with one molecule of glucose |
| III. | NADH is oxidised to NAD+ slowly | NADH is oxidised to NAD+ vigorously |
| 1. Only I and II | 2. Only I and III |
| 3. Only II and III | 4. I, II and III |
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Identify the incorrectly matched pair:
| Component of ETC | Name | |
| 1. | Complex I | NADH dehydrogenase |
| 2. | Complex II | Succinate dehydrogenase |
| 3. | Complex III | Cytochrome b6f complex |
| 4. | Complex IV | Cytochrome c oxidase |
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