Carbohydrate
The hormones, glucagon and epinephrine, stimulate glycogen breakdown to G-6-P

only in the liver
directly, by binding to glycogen phosphorylase
indirectly, by first stimulating adenylate cyclase to make cAMP
using ATP as the phosphoryl donor

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

their enzymes lose the proper three-dimensional shape
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

ANSWER DOWNLOAD EXAMIANS APP