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2 marksEnzymes

CAPE Biology Unit 1 · 2006 · Paper 2 · Question 5(c)(i)

Alpha amylases catalyze the breakdown of starch in flour during bread production. The optimum temperature for alpha amylase activity is 38°C.

Giving ONE reason, predict the effect that baking the bread over 110°C will have on enzyme activity.

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Other parts of this question

  1. 5(a)With reference to the structure of enzymes, distinguish between competitive and non-competitive enzyme inhibition.[4 marks]
  2. 5(b)Describe the steps involved in an enzyme-catalysed reaction. In your description, make reference to the active site of an enzyme-substrate complex, lowering of…[6 marks]
  3. 5(c)(ii)Giving ONE reason, predict the effect that the addition of these bicarbonate ions will have on pepsin action as the stomach contents pass into the duodenum.[2 marks]
  4. 5(c)(iii)Giving ONE reason, predict the effect that the new weight of xylanase will have on the clarification process.[2 marks]
  5. 5(c)(iv)Giving ONE reason, predict the effect that this shortage will have on the clarification process.[2 marks]
  6. 5(c)(v)Giving ONE reason, predict what would occur if xylanase were used to clarify fresh sugar cane juice.[2 marks]

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