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1 markEnzymes

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

Compound X is a substrate with two parts: Part 1 digested only by arginase, and Part 2 digested only by salivary amylase. Both enzymes are needed for complete digestion.

Determine the optimal pH at which BOTH of these enzymes together digest compound X.

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Other parts of this question

  1. 1(a)On the graph grid provided, plot a graph of the relative rates for BOTH salivary amylase and arginase.[6 marks]
  2. 1(b)(i)Using the graph, determine the optimal pH for arginase activity.[1 mark]
  3. 1(b)(ii)Using the graph, determine the optimal pH for salivary amylase activity.[1 mark]
  4. 1(d)Name TWO factors, in addition to pH, that can affect an enzyme's catalytic activity.[1 mark]

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