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| Compound | % of total dry mass | Number of different types of molecule |
| Protein | 55.0 | 1050 |
| DNA |
3.1 |
1 |
| Lipid | 9.1 | 4 |
| Glycogen | 2.5 | 1 |
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| (a) | The diagram shows the formula of a molecule of an organic compound | |||||||||||||||||
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| (i) | To which group of organic compounds does this molecule belong? | |||||||||||||||||
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| (ii) | Give one way in which this molecule differs from other compounds in the group. | |||||||||||||||||
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| (b) | The table shows some of the organic compounds found in a bacterial cell. | |||||||||||||||||
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| Glycogen and protein are both polymers. Explain why there can only be one type of glycogen molecule, but there can be many types of protein. | ||||||||||||||||||
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NEAB 1999