The α-helix and β-pleated sheet are held by

  1. peptide bonds only
  2. disulfide bonds
  3. ionic bonds only
  4. hydrogen bonds
Answer

D) hydrogen bonds

Secondary structure uses H-bonds in the backbone. AS & A Level Biology · Topic 2 Biological Molecules · 2.3 Proteins

Biology MCQ · More A Level Biology: Biological molecules MCQs · Practise