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6 marksEnzymes

CAPE Biology Unit 1 · 2005 · Paper 2 · Question 1(a)

Enzyme-catalyzed reaction rates are affected by pH. Table 1 provides relative reaction rates for salivary amylase and arginase at various pH values.

On the graph grid provided, plot a graph of the relative rates for BOTH salivary amylase and arginase.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(b)(i)Using the graph, determine the optimal pH for arginase activity.[1 mark]
  2. 1(b)(ii)Using the graph, determine the optimal pH for salivary amylase activity.[1 mark]
  3. 1(c)Determine the optimal pH at which BOTH of these enzymes together digest compound X.[1 mark]
  4. 1(d)Name TWO factors, in addition to pH, that can affect an enzyme's catalytic activity.[1 mark]

More practice: the rest of this paper · more Enzymes questions · all CAPE Biology Unit 1 past papers