An enzyme cooled from 37 °C to 5 °C and then warmed back to 37 °C will

  1. work faster than before
  2. work again normally
  3. stay denatured
  4. be destroyed
Answer

B) work again normally

Cold inactivates but does not denature enzymes. O Level Biology · Topic 5 Enzymes · 5.2 Effects of temperature and pH

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