試題詳解

4. Which of the following statements for proteins is correct?
 (i) The four levels of structure of a protein are determined by its primary sequence.
 (ii) Secondary structure includes mainly o helix and B sheet.
 (iii) Collagen has four levels of structure.
(A)i
(B)i,ii
(C)ii,iii
(D)i,iii
(E)i, ii,ii