The R-groups of an alpha-helix are separated from each other by?

a) 15 degrees of rotation

b) 90 degrees of rotation

c) 30 degrees of rotation

d) 45 degrees of rotation

What is NOT true about FAD/FADH?

a) its oxidation-reduction reactions involve the transfer of 2 electrons and 2 protons

b) its phosphates are directly involved in energy transfer

c) contains two phosphates

d) contains a vitamin component

What factor does NOT contribute to rate enhancement by enzymes?

a) enzymes promote reaction rates only in the direction of product formation

b) enzymes lower the energy of activation of reactions

c) enzymes functional group can act as acids or bases

d) enzymes provide a different reaction pathway than chemical reactions