所屬科目:學士後 - 普通生物學(生物學)
33. Comparison of the above four constructs (I, II,III , IV) for the transcription of mRNA of gene A, which of the following ; is in a correct order for the expression of gene A (From high to low)? (A) I,II,III,IV
(B) IV,III, II,I (C) II,I, III, IV(D)III,II, I,IV (E) I, II,IV,III
37. The following events occur when a mammalian immune system first encounters a pathogen. Place them in correct sequence and then choose the answer that indicates that sequence. I: Pathogen is destroyed. Ⅱ: Lymphocytes secrete antibodies. Ⅲ: Antigenic determinants from pathogen bind to antigen receptors on lymphocytes. IV: Lymphocytes specific to antigenic determinants from pathogen become numerous. V: Only memory cells remain.(A) Ⅰ ,Ⅲ, Ⅱ, Ⅳ, Ⅴ(B) Ⅲ, Ⅱ,Ⅰ, Ⅴ, Ⅳ(C) Ⅱ,Ⅰ, Ⅳ,Ⅲ,Ⅴ(D) Ⅳ, Ⅱ,Ⅲ,Ⅰ,Ⅴ(E) Ⅲ, Ⅳ, Ⅱ,Ⅰ, Ⅴ