AP BIOLOGY

Detailed explanation-1: -Microbial enzymes are inactive at low temperature .

Detailed explanation-2: -Psychrophiles have evolved by producing, among other peculiarities, “cold-adapted” enzymes which have the properties to cope with the reduction of chemical reaction rates induced by low temperatures.

Detailed explanation-3: -Lower temperatures lead to slower chemical reactions. Enzymes will eventually become inactive at freezing temperatures but will restore most of their enzyme activity when temperatures increase again, while some enzymes lose their activity when frozen.

Detailed explanation-4: -In a cold environment, enzymes function more slowly because the molecules are moving more slowly. The substrate bumps into the enzyme less frequently. As the temperature increases, molecules move more quickly, so the enzyme functions at a higher rate.