Question:
Outline the key roles for membranes within cells with examples
Author: M GarciaAnswer:
- membrane around organelles divides the cell into different compartments.
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Alternative answers:
- acts as a barrier between organelle and cytoplasm making its function more efficient. For example: the substances for respiration are kept together inside by the mitochondrion's outer membrane.
- membranes can form vesicles to transport substances to different areas of the cell. For example: vesicles transport proteins from the RER to Golgi apparatus during protein synthesis
- membranes are also partially permeable, therefore can control which substances enter or leave the organelle. For example: RNA leaves the nucleus via the nuclear membrane.
- it can be the site of chemical reactions. For example: the mitochondrion's inner membrane.
Author
M Garcia