- 1(current)
Q. No.Which energy-dependent process transports ions or molecules across the cell membrane against their concentration gradient, utilizing ATP?
| 1. | Passive transport |
| 2. | Simple diffusion |
| 3. | Facilitated diffusion |
| 4. | Active transport |
Subtopic: Â Evidence for Fluidic Nature of Membrane |
 90%
Level 1: 80%+
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The ability to move within the membrane is measured as its
| 1. | liquidity | 2. | fluidity |
| 3. | viscosity | 4. | stability |
Subtopic: Â Evidence for Fluidic Nature of Membrane |
 93%
Level 1: 80%+
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The fluid mosaic model of plasma membrane proposes that:
| 1. | Proteins form a continuous rigid layer around lipid molecules |
| 2. | Lipids are embedded within a protein matrix forming a static structure |
| 3. | Both proteins and lipids are immobile within the membrane |
| 4. | Proteins are dispersed in a phospholipid bilayer and show lateral movement |
Subtopic: Â Cell Membrane |Â Evidence for Fluidic Nature of Membrane |
 87%
Level 1: 80%+
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State the following statements as true (T) or false (F) and select the correct option.
| A. | Integral proteins are partially or totally buried in the membrane. |
| B. | Human RBC membrane has approximately 52% proteins. |
| C. | Proteins move laterally within overall bilayer of membrane. |
| A | B | C | |
| 1. | T | T | T |
| 2. | F | T | F |
| 3. | T | F | T |
| 4. | F | F | T |
Subtopic: Â Cell Organisation |Â Cell Membrane |Â Evidence for Fluidic Nature of Membrane |
 86%
Level 1: 80%+
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The diagram below represents the fluid mosaic model of the cell (surface) membrane.
Only two of the labelled molecules have both hydrophobic and hydrophilic areas. Which two molecules are they?
1. P and Q
2. R and S
3. Q and R
4. S and T
Subtopic: Â Evidence for Fluidic Nature of Membrane |
 84%
Level 1: 80%+
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How are lipid molecules arranged in the plasma membrane?
| 1. | Single layer |
| 2. | Bilayer with hydrophilic heads outside and hydrophobic tails inside |
| 3. | Random arrangement |
| 4. | Triple layer |
Subtopic: Â Cell Membrane |Â Evidence for Fluidic Nature of Membrane |
 97%
Level 1: 80%+
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- 1(current)
Q. No.
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