Table 73
the Following Data Were Obtained by Incubating the Bacteria

question 18

Multiple Choice

Table 7.3
The following data were obtained by incubating the bacteria in nutrient medium + disinfectant for 24 hr, then transferring one loopful to nutrient medium (subculturing.) $\quad\quad\quad\quad\quad\quad\quad\quad \underline{\text { Doom }} \quad \quad\quad\quad\quad\quad\quad\underline{K O}$
$\begin{array}{rrrrr}\text { Dilution } & \text { Initial } & \text { Subculture } & \text { Initial } & \text { Subculture } \\1: 16 & - & + & + & + \\1: 32 & - & + & + & + \\1: 64 & - & + & + & + \\1: 128 & + & + & + & +\end{array}$

$\quad\quad\quad\quad\quad\quad\quad\quad \underline{\text { Mortum } }\quad\quad\quad\quad\quad\quad \underline{\text { Sterl }}$
$\begin{array}{rrrrrr}\text { Dilution } & \text { Initial } & \text { Subculture } & \text { Initial } & \text { Subculture } \\1: 16 & - & - & - & + \\1: 32 & - & + & + & + \\1: 64 & + & + & + & + \\1: 128 & + & + & + & +\end{array}$
-In Table 7.3, which disinfectant is the most effective at stopping bacterial growth?

• A) Doom
• B) K.O.
• C) Mortum
• D) Sterl
• E) Can't tell

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