Skip to content
MathsGenie logo
Open app

Course home

  1. IGCSE
  2. Biology Edexcel
  3. Question bank

Biological molecules

EasyMedium
123456789101112131415161718
Question 18

All living cells contain enzymes that act as catalysts.

a.

Explain how an enzyme acts as a catalyst in terms of activation energy.

[2]
b.

The table lists some enzymes, their substrates, and their products. Complete the table by giving the missing information for (i) to (v).

EnzymeSubstrateProduct(s)
(i)maltoseglucose
sucrasesucrose(ii)
amylase(iii)maltose
proteaseproteins(iv)
lipase(v)fatty acids and glycerol
[5]
c.

Explain how changes in temperature affect the rate of an enzyme-controlled reaction.

[4]

Biological molecules Questions

  1. IGCSE
  2. /Biology
  3. /Biological molecules