TLS Online TPP Program

#Question id: 28044


Which one of the following is INCORRECT about protein structures?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. A protein fold is stabilized by favorable noncovalent interactions
  2. All parts of a fold can be classified only as helices, or turns
  3. Two non-covalent atoms cannot be closer than the sum of their van der Waals radii
  4. The peptide bond is nearly planar