In the amylase investigation, the end point is when samples

  1. no longer turn blue-black with iodine
  2. turn brick-red
  3. turn blue-black
  4. become cloudy
Answer

A) no longer turn blue-black with iodine

Starch has been hydrolysed. AS & A Level Biology · Topic 3 Enzymes · 3.1 Mode of action of enzymes

Biology MCQ · More A Level Biology: Enzymes MCQs · Practise