- 1(current)
Q. No.The lipid content of the cell membrane mainly consists of:
| 1. | Phosphoglycerides | 2. | Cholesterol |
| 3. | Unsaturated fatty acids | 4. | Lipopolysaccharides |
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The component molecules of the cell membrane have two main parts, the head and the tail. These parts are either hydrophobic (repelled by water) or hydrophilic (attracted to water). Which is which?
| 1. | Hydrophilic Head and Hydrophobic Tail |
| 2. | Both Hydrophobic |
| 3. | Hydrophilic Tail and Hydrophobic Head |
| 4. | Both Hydrophilic |
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Mannans, Xylans, Alginic acid and sulfonated polysaccharides are seen in the cell walls of:
| 1. Algae | 2. Archaebacteria |
| 3. Fungi | 4. Plants |
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In the given diagram, the plasma membrane, primary cell wall, secondary cell wall and the middle lamella are shown respectively by:
| 1. D, B, C and A | 2. D, C, B and A |
| 3. D, A, B and C | 4. A, B, C and D |
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| I: | mainly consists of calcium carbonate |
| II: | holds or glues the different neighbouring cells together |
| III: | is not traversed by plasmodesmata |
| 1. | Only II is correct |
| 2. | Only I is incorrect |
| 3. | I, II and III are incorrect |
| 4. | Only II and III are correct |
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Consider the given two statements:
I. Several antibiotics (notably the penicillins and cephalosporins) stop bacterial infections by interfering with cell wall synthesis
II. Such antibiotics have no effects on human cells which have no cell wall, only a cell membrane
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
- 1(current)
Q. No.
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