week 10 Final lab Flashcards


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1

UV light has ______ wavelengths than visible light waves, and its peak energy is at a wavelength of ______.

Shorter; 254nm

2

Which of the following would be appropriately sterilized using UV radiation

Stainless steel surface in biological safety cabinet used for media preparation

3

Which of the following DNA sequences would be the most likely to be damaged by UV radiation?

CTTGAATTA

4

Which of the following infectious agents is least likely to be damaged by UV exposure?

prions

5

which structures are less susceptible to uv damage

Endospores

6

When two adjacent thymine molecules are joined by a covalent bond as a result of exposure to UV light, this structure is referred to as a

thyme dimer

7

Which of the following are limitations of using UV radiation for disinfection?

UV radiation does not penetrate through paper, plastic, or liquids

UV radiation destroys bacteria but not viruses

UV radiation can damage the skin and eyes

8

How is an antiseptic different from a disinfectant

An antiseptic is used to remove or kill microorganisms on tissue, whereas a disinfectant is used to remove or kill microorganisms on inanimate objects.

9

How is an antiseptic different from a disinfectant

An antiseptic is used to remove or kill microorganisms on tissue, whereas a disinfectant is used to remove or kill microorganisms on inanimate objects.

10

Betadine, an iodine compound used to scrub skin before a surgical incision, is considered a(n)

Antiseptic

11

The chemical that you use to wipe down your lab bench at the beginning and end of a lab exercise is an example of a(n

disinfectant

12

What will be the variable in the four quadrants of the plate?

Type of antiseptic

13

What is the purpose of water in the experiment?

A negative control