| I: | independent existence | 
| II: | performing the essential functions of life | 
| 1. | Extensive compartmentalisation of cytoplasm. | 
| 2. | The presence of membrane bound organelles. | 
| 3. | An organised nucleus with a nuclear envelope. | 
| 4. | Genetic material organised into chromosomes. | 
| I: | It is mainly composed of lipids and proteins. | 
| II: | The major lipids are phospholipids, that are arranged in a bilayer. | 
| III: | The lipids are arranged within the membrane with the hydrophobic head towards the outer sides and the polar tails towards the inner part. | 
| IV: | In addition to phospholipids, membrane also contains cholesterol. | 
| V: | Peripheral proteins lie on the surface of membrane while the integral proteins are partially or totally buried in the membrane | 
| a. | Frequently observed in the cells actively involved in protein synthesis and secretion | 
| b. | Extensive and continuous with the outer membrane of the nucleus | 
| c. | The major site for synthesis of lipid | 
| d. | Synthesis of lipid-like steroidal hormones in animal cells | 
| 1. | a and b | 2. | c and d | 
| 3. | a and c | 4. | b and d | 
| a. | Mitochondria are easily visible under the microscope without any staining. | 
| b. | The number of mitochondria per cell is always fixed irrespective of the physiological activity of the cells. | 
| c. | Mitochondria are the sites of aerobic respiration. | 
| d. | Mitochondria divide by fission. | 
| 1. | Two centrioles are contained in a centrosome. | 
| 2. | The centrioles are surrounded by amorphous pericentriolar materials. | 
| 3. | Both centrioles in a centrosome lie parallel to each other. | 
| 4. | Both centrioles in a centrosome have an organisation like the cartwheel |