AS BIOLOGY Paper 1. EXAM PREDICTIONS . HIGHLY EXMINABLE QUESTIONS

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Figure 1 shows the structure of molecules found in organisms. Figure 1 0 1 . 1 Complete Table 1 by putting the correct letter, A, B, C or D, in the box next to each statement. Each letter may be us... ed once, more than once, or not at all. [4 marks] Table 1 Letter Statement is a monomer in an enzyme’s active site is a monomer in cellulose is produced during photosynthesis and respiration forms a polymer that gives a positive result with a biuret test3 *03* Turn over ► IB/M/Jun20/7401/1 Do not write outside the 0 1 . 2 Raffinose is a trisaccharide of three monosaccharides: galactose, glucose and box fructose. The chemical formulae of these monosaccharides are: • galactose = C6H12O6 • glucose = C6H12O6 • fructose = C6H12O6 Give the number of carbon atoms, hydrogen atoms and oxygen atoms in a molecule of raffinose. [1 mark] Number of carbon atoms Number of hydrogen atoms Number of oxygen atoms 0 1 . 3 A biochemical test for reducing sugar produces a negative result with raffinose solution. Describe a biochemical test to show that raffinose solution contains a non-reducing sugar. [ [Show More]

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