Question

Use of moist heat can control microbial growth in many circumstances, but heat-sensitive items and those susceptible to moisture cannot be sterilized in this manner. Which of the following correctly describes a method of physical control used to control microbial growth on or in such items?

Select all that apply.

Filtration is the passage of a liquid or a gas through a screenlike material with pores small enough to retain microorganisms. A vacuum is typically used to force the liquid through the mesh, and then the sterile liquid or gas is collected in a sterile container on the other side.
Nonionizing radiation, such as UV light, has a wavelength longer than that of ionizing radiation. The wavelengths of UV light are absorbed by cellular DNA in organisms directly exposed to the light.
Desiccation is a process that removes water from microorganisms, leaving them unable to grow or reproduce, but still viable.
Osmotic pressure is a process that uses high concentrations of salts and sugars to preserve food.

Answer 1

Filtration and non-ionizing radiation.

Step-by-step explanation:

Filtration is a correct method of sterilization for items susceptible to heat. (Nutritive medium for example), the pore needs to be small enough to prevent bacteria or viruses from passing through the filter.

Non-ionizing radiation, like UV light it is also used for sterilization. It is often used for sterile material not containing biological substances.

Desiccation is not used for sterilization, spores form part of many bacteria, fungi and protozoa that will be able to grow once conditions are moist enough. It will control the microbial growth but no sterilize (meaning killing all forms of microbial life)

Osmotic pressure happens to be a great process to preserve food, but not for sterilization, again, it will control most of it but will not sterilize it.