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 |
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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 |
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Consider the given two statements:
Statement-I: | Chloroplasts are considered endosymbiotic Cyanobacteria. |
Statement-II: | Cyanobacteria consist of free-living photosynthetic bacteria. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect