問題詳情

70.下列敘述何者正確？
(A)Bacitracin與vancomycin干擾細菌細胞膜之合成
(B)Gramicidins與polymyxins干擾細菌細胞壁之合成
(C)Bacitracin與vancomycin主要對抗G(+)菌
(D)Gramicidin與polymyxins主要對抗G(-)菌

參考答案

答案：C
難度：簡單0.750769
統計：A(78),B(65),C(732),D(100),E(0)

用户評論

【jane90191】評論

二樓的寫錯喔Vancomycin 細胞壁 →G(＋)Bacitracin  細胞壁 →G(＋) 相反  Polymyxin B 細胞膜 →G(－)Gramicidin 細胞膜 →G(+)

【小羊】評論

Polypeptides細胞壁-G(+)           -Gramicidin           -Bacitracin細胞膜-G(-)           -Polymyxin B           -Colistin (= Polymyxin E)

【bb991921bb】評論

Gramicidin is a cyclic polypeptide antibiotic obtained from Bacillus brevis dubos and other related B brevis strains [32][33][28]. This hydrophobic compound consists of at least 3 different open-chain pentadecapeptides [28]. It is active primarily against gram-positive organisms, and antimicrobial effects are presumably related to its ability to form cation conductive channels in the bacterial cell membrane; cell death is secondary to changes in cellular cation content, especially the loss of potassium [32][28]...

【May】評論

跟細胞膜這邊有關的抗生素polymyxin、colistin A是抗G-其他都是抗G+

【安安順利】評論

G(+)Bacitracin[壁]Vancomycin[壁]Gramicidin[膜] G(-)  Polymyxin[膜] 

【香餑餑】評論

21 下列 polypeptides 類抗生素中，何者結構上非環狀？