Quelpr
2 marksEnzymes

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

The enzyme xylanase digests xyloglucans in fresh apple juice. Twenty grams of purified xylanase clarifies 1000 litres of apple juice in 30 minutes. In a new clarification process, 30 g of xylanase will be used in the same volume of apple juice.

Giving ONE reason, predict the effect that the new weight of xylanase will have on the clarification process.

The mark scheme is shown once you've answered.

Practise this question

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)(i)Giving ONE reason, predict the effect that baking the bread over 110°C will have on enzyme activity.[2 marks]
  4. 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]
  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]

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