Effects of temp/UV light

Question 1

Moist heat vs dry heat

Answer 1

moist heat is better and faster at low temperatures

Question 2

TDT?

thermal death time

Answer 2

time it requires to kill all bacteria at a given temperature

Question 3

TDP?

thermal death point

Answer 3

the temperature required to kill all bacteria in ten minutes

Question 4

Ionizing radiation?

Answer 4

X rays and gamma rays
disrupts dna and rna
used for sterilization

Question 5

non ionizing radiation

Answer 5

UV rays

used to reduce microbial populations does not kill spores however

Question 6

wavelength of biocidal?

Answer 6

200-290nm

Question 7

role of photolyases?

Answer 7

split the dimers and repair the dna

Question 8

how do you spot a mutation?

Answer 8

you see white colonies formed

Question 9

limitations of UV light?

Answer 9

has weak penetration

Question 10

the most sensitive organisms to light will be ?

Answer 10

unpigmented

Question 11

second most sensitive will be ?

Answer 11

pigmented

Question 12

least sensitve to light effects?

Answer 12

spore formers

Question 13

what are thymine dimers

Answer 13

they are caused by UV rays and lead to mutations