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1.4 Membranes
(3h) |
| 1.4.1 |
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Draw a labelled diagram of the
structure of a plasma membrane. |
1 |
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(show the phospholipid bilayer, cholesterol, glycoproteins and
integral and peripheral proteins. )
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| 1.4.2 |
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Explain how the properties of
phospholipids help to maintain the structure of cell membranes. |
3 |
| 1.4.3 |
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List FIVE functions of membrane
proteins
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1 |
| 1.4.4 |
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Define diffusion.
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1 |
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e.g. This is how you would define osmosis.
Osmosis is the passive movement of water molecules, across a
partially permeable membrane, from a region of lower solute (dissolved
salt) concentration to a region of higher solute (dissolved salt)
concentration.
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| 1.4.5 |
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Explain how protein channels allow
passive transport across membranes. |
3 |
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| 1.4.6 |
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Explain the role of protein pumps
and ATP in active transport
.
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3 |
| 1.4.7 |
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Explain where and how vesicles are
used in transport within a cell.
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3 |
| 1.4.8 |
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Describe how the properties of the
membrane help endocytosis and exocytosis.
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