| Assertion (A): | The cell membrane is selectively permeable to ions and organic molecules. |
| Reason (R): | The permeability of the cell membrane is due to its phospholipid bilayer structure. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| Assertion (A): | Polar molecules like glucose require carrier proteins to cross the plasma membrane. |
| Reason (R): | Glucose can only be transported across the plasma membrane by active transport. |
| 1. | Both (A) and (R) are True, and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True, but (R) is not the correct explanation of (A) |
| 3. | (A) is True, but (R) is False |
| 4. | (A) is False, but (R) is True |