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Movement across cell membranes

The movement of substances across cell membranes is an important and recurring theme in biology. Former chief examiner Martin Rowland reviews the knowledge and understanding that students are expected to show

Cells cannot survive unless they can gain essential metabolites and lose toxic waste products. Within cells, metabolites must cross the membranes that separate different cellular compartments and organelles. But cellular membranes act as barriers that prevent the passage of ions and molecules.

Question 1: Name five membrane-bound organelles.

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Previous

Influenza: how the virus replicates using our cells

Next

When molecular mimicry fails, autoimmune disease prevails

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