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8 marksEnzymes

CAPE Biology Unit 1 · 2008 · Paper 2 · Question 4(c)(i)

Explain the mode of enzyme action according to the 'lock and key hypothesis'.

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  1. 4(a)By means of a diagram, show the molecular structure of sucrose. Show the position of the oxygen and all other groups, EXCEPT for the H,OH groups on the No. 2,…[3 marks]
  2. 4(b)(i)Relate the structure of the water molecule to its solvent properties.[4 marks]
  3. 4(b)(ii)Relate the structure of the water molecule to its high surface tension.[4 marks]
  4. 4(c)(ii)Comment on differences in the way in which competitive and non-competitive inhibitors affect enzyme activity.[8 marks]

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