Biology 9700 · AS & A Level · Factors that affect enzyme action

Factors that affect enzyme action — practice question

The enzyme trypsin hydrolyses proteins to amino acids, but it does not work when the pH is very low because its 3D shape would alter. What causes this change in 3D shape?

  • AHydrogen ions attach themselves to negatively charged R groups.
  • BHydrogen ions disrupt disulfide bonds.
  • CHydrogen ions increase hydrogen bonding between amino acids.
  • DHydrogen ions reduce the affinity of hydrophilic R groups for water.

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