Cold Temperatures Are Considered Microbistatic, Whereas Excessive Heat Is Considered

question 80

Multiple Choice

Cold temperatures are considered microbistatic, whereas excessive heat is considered microbicidal. This is due to the fact that

• A) in cold temperatures, the energy of activation is not sufficient to drive chemical reactions regardless of the
• presence of enzymes, whereas excessive heat denatures enzymes and/or incinerates the cell causing irreparable damage.
• B) cold temperatures denature enzymes causing irreparable damage to the cell, whereas heat limits the energy of activation available to drive chemical reactions.
• C) cold temperatures freeze and therefore kill the cell, whereas excess heat keeps the cell metabolically active but not dividing.
• D) cold temperatures halt binary fission and is therefore considered a sterilant, whereas heat does not kill spores so . it is not an effective method of control

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Definitions:

Space Heating

The process of providing heat to interior spaces for the purpose of ensuring comfort for occupants, typically accomplished through systems such as furnaces, heat pumps, or radiators.

Net Energy

The amount of energy available after subtracting the energy expended to obtain and use that energy.

Liquefied Petroleum Gas

A flammable mixture of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles, commonly known as LPG.

Butane

A gaseous hydrocarbon (C4H10) that is a constituent of natural gas and petroleum, used as a fuel and in the manufacture of organic compounds.