| I: | \(\mathrm{C_6H_{12}O_6} → 2~ \text {pyruate} + \text{X} \text {ATP}\) | 
| II: | \(\mathrm{C_6H_{12}O_6} → 2~ \text {lactate} + \mathrm{X} \text {ATP}\) | 
| III: | \(\mathrm{C_6H_{12}O_6} → 2~ \text {alcohol} + 2 \mathrm{CO_2}+\mathrm{X} \text {ATP}\) | 
| Statement I: | ATP formation by glycolysis requires oxygen | 
| Statement II: | ATP can be formed through substrate-level phosphorylation and this process requires a high-energy phosphate group that is transferred directly to ADP. | 
| I: | It is composed of flavin mononucleotide (FMN) and an iron-sulfur (Fe-S)-containing protein. | 
| II: | The enzyme in complex I is NADH dehydrogenase. | 
| III: | It can pump four hydrogen ions across the membrane from the matrix into the intermembrane space. | 
| Statement I: | Both photosynthesis and aerobic cellular respiration occur in plant cells but only aerobic cellular respiration occurs in animal cells. | 
| Statement II: | Both photosynthesis and aerobic cellular respiration occur during the daylight hours, but only aerobic cellular respiration occurs at night. | 
| I: | Ethanol fermentation | 
| II: | Lactate fermentation | 
| 1. | 5 per cent. | 2. | 13 per cent. | 
| 3. | 20 per cent. | 4. | 45 per cent. | 
| 1. | Only I | 2. | Only II | 
| 3. | Both I and II | 4. | Neither I nor II | 
| 1. | is a small protein attached to the inner surface of the outer membrane and acts as a mobile carrier for transfer of electrons between complex III and IV. | 
| 2. | is a small protein attached to the outer surface of the inner membrane and acts as a mobile carrier for transfer of electrons between complex III and IV. | 
| 3. | is a lipid present within the inner membrane and acts as a mobile carrier for transfer of electrons between complex I and II. | 
| 4. | is a lipid present within the inner membrane and acts as a mobile carrier for transfer of electrons between complex II and III. |