問題詳情

12.炭疽桿菌在egg yolk agar(EYA)上形成的菌落周圍有不透明環,顯示其具有下列何種特性?
(A)lecithinase
(B)lipase
(C)protease
(D)urease

參考答案

答案:A
難度:簡單0.83848
統計:A(353),B(27),C(24),D(17),E(0)

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Figure: Bacillus cereus on egg yolk agar. Note the precipitation around the streak of bacteria, which shows that they are positive for lecithinase.

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Egg Yolk agar1.lecithinase(+) 不透明環2.lipase(+) 虹彩光澤3.proteolytic enzyme(+) 透明環