Paper 2 · Proteins and Amino Acids
Globular proteins differ from fibrous proteins in that globular proteins have
Arepetitive amino acid sequences and long strands
Bhydrophobic groups facing the surrounding water
Chigh tensile strength and no tertiary structure
Dirregular amino acid sequences and a compact shape
Explanation: A globular protein folds its irregular polypeptide chain into a roughly spherical, compact ball. A fibrous protein has a repeating sequence that lets the chains lie alongside one another in long strands, which is what gives collagen and keratin their strength.
Derived from ZIMSEC Biology Paper 2, June 2020, Q1