Which words from the table best fill the gaps in the paragraph about enzymes? If the pH of a setting falls below an enzyme’s optimum pH, ……1…… bonds joining neighbouring ……2…… groups that maintain the ……3…… structure are broken.
- A1: hydrogen and ionic; 2: R; 3: tertiary
- B1: hydrogen; 2: hydroxyl; 3: secondary
- C1: ionic and peptide; 2: R; 3: primary and tertiary
- D1: peptide; 2: amine; 3: primary