In the fluid mosaic model of a plasma membrane:
| 1. | Upper layer is non-polar and hydrophilic |
| 2. | The polar layer is hydrophobic |
| 3. | Phospholipids form a bimolecular layer in the middle part |
| 4. | Proteins form a middle layer |
The cell membranes are mainly composed of:
1. Phospholipids
2. Proteins
3. Fats
4. Carbohydrates
Which one of the following is not a constituent of the cell membrane?
1. Cholesterol
2. Glycolipids
3. Proline
4. Phospholipids
The plasma membrane consists mainly of:
| 1. | phospholipids embedded in a protein bilayer |
| 2. | proteins embedded in a phospholipid bilayer |
| 3. | proteins embedded in a polymer of glucose molecules |
| 4. | proteins embedded in a carbohydrate bilayer |
Which of the following statement is not true for plasma membrane?
| 1. | It is present in both plant and animal cell. |
| 2. | Lipid is present as a bilayer in it. |
| 3. | Proteins are present, integrated as well as loosely associated, with the lipid bilayer |
| 4. | Carbohydrate is never found in it |
| 1. | Substances with hydrophobic moiety |
| 2. | Substances with hydrophilic moiety |
| 3. | All substances, irrespective of hydrophobic and hydrophilic moiety |
| 4. | Substances which are soluble in lipids |
Select the correct statement from the following regarding cell membrane:
| 1. | Na+ and K+ ions move across cell membranes by passive transport |
| 2. | Proteins make up 60% to 70% of the cell membrane |
| 3. | Lipids are arranged in a bilayer with polar heads towards the inner part |
| 4. | Fluid mosaic model of the cell membrane was proposed by Singer and Nicolson |