34. 甲硫胺酸(methionine)為必需胺基酸，其側鏈(side chain)具有何種基團？
(A)indole group
(B)thioether group
(C)hydroxyl group
(D)guanidine group

答案：登入後查看
統計： A(1), B(2), C(0), D(1), E(0) #898639