| List-I | List-II | ||
| A. | Citric acid cycle | I. | Cytoplasm | 
| B. | Glycolysis | II. | Mitochondrial matrix | 
| C. | Electron transport system | III. | Intermembrane space of mitochondria | 
| D. | Proton gradient | IV. | Inner mitochondrial membrane | 
The ultimate electron acceptor of respiration in an aerobic organism is
1. cytochrome
2. oxygen
3. hydrogen
4. glucose
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 | 
Oxidative phosphorylation is
| 1. | formation of ATP by transfer of phosphate group from a substrate to ADP | 
| 2. | oxidation of phosphate group in ATP | 
| 3. | addition of phosphate group to ATP | 
| 4. | formation of ATP by energy released from electrons removed during substrate oxidation | 
In mitochondria, protons accumulate in the:
1. Matrix
2. Outer membrane
3. Inner membrane
4. Intermembrane space
| 1. | Enzymes of the TCA cycle are present in the mitochondrial matrix. | 
| 2. | Glycolysis occurs in the cytosol. | 
| 3. | Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms. | 
| 4. | Oxidative phosphorylation takes place in the outer mitochondrial membrane. | 
The end product of oxidative phosphorylation is
1. NADH
2. oxygen
3. ADP
4. ATP+ H2O