Table 203
the Following Data Were Obtained from a Broth Dilution

question 19

Multiple Choice

Table 20.3
The following data were obtained from a broth dilution test:

$\begin{array}{ll}\text { Concentration of Antibiotic } X&\text { Growth }\\\hline2.0 \mu \mathrm{g} / \mathrm{ml} & - \\1.0 \mu \mathrm{g} / \mathrm{ml} & - \\0.5 \mu \mathrm{g} / \mathrm{ml} & - \\0.25 \mu \mathrm{g} / \mathrm{ml} & + \\0.125 \mu \mathrm{g} / \mathrm{ml} & + \\0 & +\end{array}$
Bacteria from the 0.25 µg/ml tube were transferred to new growth media containing antibiotic X with the following results:

$\begin{array}{ll} \underline{\text { Concentration of Antibiotic }} X& \underline{\text { Growth} }\\2.0 \mu \mathrm{g} / \mathrm{ml} \\1.0 \mu \mathrm{g} / \mathrm{ml} & - \\0.5 \mu \mathrm{g} / \mathrm{ml} & + \\0.25 \mu \mathrm{g} / \mathrm{ml} & + \\\end{array}$
-The data in Table 20.3 show that these bacteria

• A) Developed resistance to antibiotics.
• B) Can be subcultured.
• C) Were killed by 0.5 µg/ml of antibiotic X.
• D) Were killed by 0.125 µg/ml of antibiotic X.
• E) Were resistant to 1.0 µg/ml at the start of the experiment.

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Definitions:

Insufficient Justification Effect

A phenomenon where individuals rationalize their behavior when the external justification is insufficient, leading to a change in their internal beliefs or attitudes.

Eye Contact

The act of looking directly into another individual’s eyes, which is an important part of nonverbal communication.

Respect

An attitude of esteem or deference toward others, acknowledging their abilities, qualities, or achievements.

Truthfulness

The quality of being honest or true; not lying, cheating, or stealing.