Cells

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What constitutes a cell

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Cell - the basic unit from which living organisms are made, consisting of an aqueous solution of organic molecules enclosed by a membrane. All cells arise from existing cells, usually by a process division

All cells have a cell membrane that separates the outside from the organised interior

contain DNA as genetic material (exceptions)

contain several varieties of RNA molecules and proteins -mostly

are composed of the same basic chemicals: carbohydrates, proteins, nucleic acids,

fats and vitamins.

Regulate the flow of nutrients and

that enters and leaves the cell.

Reproduce and are the result of reproduction

Require a supply of energy.

Dimensions of a cell:

Dimensions of a virus



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