UV light 2-13 part of quiz

For ultraviolet UV light, What type of wave length radiation is it. Which falls between 4nm and 400nm in the visible spectrum

Nonionizing short wavelength

Most bacteria’s are killed by UV because its lethal dues o its mutagenic effec hence used in sterilization, what specific nm is that?

260nm

UV-A is the ?

Longest wavelength (315 to 400 nm)

UV-B what’s the nm

280 to 315nm

Which UV would be used that would cause you’re a parable DNA damage and death of the organism which they cannot conjugate or colonize

It would be UV-C 100nm to 280 nm

Which one would be: Energy emitted from atomic activities and disbursed at high velocity through matter or space. Different wavelengths forming an electromagnetic field

Radiation

Which one would be: Deep, penetrating power that has sufficient energy to cause electrons to leave their orbit, breaking DNA

Ionizing radiation

What does Gamma-ray machines contain?

They contain radioactive Co

What are the advantages of using ionizing radiation?

Speed, High penetrating power, it can sterilize material through outer packages at wrapping and the absence of heat.

What are the disadvantages of using ionizing radiation?

Potential dangers from factory exposure to radiation and possible damage to some materials

Steps, for which type of repair: exposure to ultraviolet light causes adjecent thymines to become cross-linked form in dimer and disrupting their normal base pairing. An endonuclease cutes the DNA and exonuclease removes the damage DNA. DNA polymerase fills the gap by synthesizing new DNA using the interact strand as a template. DNA ligase heals the remaining gap by joining the old and new DNA

Excision repair (parentheses dark repair)

What is Bacteriocidal effect?

Killing of bacteria

What is bacterialstatic effect?

Inhibition of bacterial growth

What is use for destroying fungals cells, spores, bacterial vegetative cells Protozoa, viruses

UV, non inning radiation

If DNA absorbs UV light it causes what formation.?

Pyridine dimers formation.

What’s the correct order of the steps

Thymine dimer, endonuclease, DNA polymerase, DNA ligase

What does phenol and phenol derivatives do?

They disrupt cell walls and membranes and precipitate proteins.

What do halogens do? For example Chlorine C12, hypochlorites (chlorine bleach)?

Denatures protein by disrupting disulfide bonds.

What do halogens do? For example Iodine I2, iodophors (betadine)?

Denatures protein, can be a disinfectant and antiseptic

What does alcohol need in order to denature proteins, 60-95% is best

It needs water to denature proteins, 100% is not 100% effective

This compound does not kill endospores, Mycobacterium or Pseudomonas

Quaternary Ammonium Compound

What does hydrogen peroxide produce that is highly reactive that damages protein and DNA

Highly reactive hydroxyl-free radicals