Carbohydrate
The conversion of pyruvate to oxaloacetate

all of the above
involves the fixation of carbon dioxide
requires biotin
occurs in the mitochondria

ANSWER DOWNLOAD EXAMIANS APP

Carbohydrate
When living organisms are cooled below some critical body temperature, the metabolic reactions within their cells cease to function properly. This malfunction occurs because

the activation energy for the reaction is raised
enzyme active sites become permanently bound to substrates
there is insufficient molecular motion for substrates to interact
their enzymes lose the proper three-dimensional shape

ANSWER DOWNLOAD EXAMIANS APP