Which of the Following Statements About Quaternary Ammonium Compounds Is

question 57

Multiple Choice

Which of the following statements about quaternary ammonium compounds is FALSE?

• A) They are a type of detergent.
• B) Zephiran is an example of a quat.
• C) They are not effective against Pseudomonas aeruginosa.
• D) They function by cross-linking proteins.
• E) They are harmless to humans except at high concentrations.

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Definitions:

Trichromatic Theory

The theory of color vision suggesting that three types of cones in the retina each make a maximal chemical response to one of three colors—blue, green, or red.

Color Sensitive Cones

Photoreceptor cells in the retina of the eye that are responsible for color vision under bright light conditions.

Retina

The light-sensitive layer of tissue at the back of the inner eye, which converts light images into electrical signals sent to the brain.

Saturation

The purity of a color, or the degree to which the light waves producing it are of the same wavelength.