QUESTIONS

(a) The diagram shows the formula of a molecule of an organic compound

(i) To which group of organic compounds does this molecule belong?

(1)

(ii) Give one way in which this molecule differs from other compounds in the group.

(1)

(b) The table shows some of the organic compounds found in a bacterial cell.
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
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.

(2)

NEAB 1999

 

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