Cold Temperatures Are Considered Microbistatic, Whereas Excessive Heat Is Considered

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