Question

question 4 (1 point)
physical methods of microbial control include heat, cold, radiation, drying, and filtration
a) true
b) false
question 5 (1 point)

1. sterilization by filtration removes microbes from heat - sensitive liquids and circulating air. the type of microbe removed depends on the

a) ph of the liquid
b) temperature of the liquid
c) temperature of the air
d) pore size of the filter.

Explanation:

• Question 4: Physical methods of microbial control indeed include heat (e.g., pasteurization), cold (retards microbial growth), radiation (e.g., UV - radiation), drying (desiccation), and filtration (removes microbes).
• Question 5: In sterilization by filtration, the pore size of the filter determines which microbes are removed. Smaller - sized pores can remove smaller microbes. pH of the liquid, temperature of the liquid or air do not determine the type of microbe removed in filtration - based sterilization.

Answer:

• Question 4: A. True
• Question 5: D. pore size of the filter.