Practice question
Question
Two cell-wall samples are chemically analysed:
Sample P contains cellulose, galactans, mannans and calcium carbonate.
Sample Q contains cellulose, hemicellulose, pectins and proteins.
Which interpretation is most appropriate?
Explanation
Algal walls may contain cellulose, galactans, mannans and minerals such as calcium carbonate. In other plants, the wall is composed of cellulose, hemicellulose, pectins and proteins.
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