Which concentration of ethanol is the most effective bactericide?
A) 50 percent
B) 30 percent
C) 40 percent
D) 100 percent
E) 70 percent

Question

Quizplus · Accepted Answer

70 percent ethanol is most effective as a bactericide because it penetrates the cell wall more completely, denaturing proteins and dissolving lipids, while higher concentrations can coagulate proteins on the cell surface, preventing deeper penetration.

Which Concentration of Ethanol Is the Most Effective Bactericide