Most bacteria contain plasmids that often encode for traits that are:
| 1. | advantageous but not essential to their bacterial host |
| 2. | advantageous and essential to their bacterial host |
| 3. | not advantageous but essential to their bacterial host |
| 4. | neither advantageous nor essential to their bacterial host |
| I: | The outermost layer of the cell envelope is called as the glycocalyx which may be present as a loose sheath called the slime layer or a thick and tough capsule. |
| II: | The cell wall determines the shape of the cell and provides a strong structural support to prevent the bacterium from bursting or collapsing. |
| III: | Plasma membrane is selectively permeable in nature and interacts with the outside world. |
| IV: | Bacterial cells can be classified as Gram positive and Gram negative based on the staining properties of their plasma membrane. |
| 1. | All except IV | 2. | Only I and II |
| 3. | I, II, III and IV | 4. | Only II, III and IV |