Which macromolecule catalyzes chemical reactions, thus be considered an enzyme?

proteins

Explanation:

Macromolecules are molecules that have a large size and are formed through the polymerization of smaller units. Some examples of macromolecules are nucleic acids, carbohydrates, proteins and lipids.

Enzymes are molecules that act by catalyzing chemical reactions, this means that these molecules accelerate the rate at which the reaction occurs (but does not affect the balance).

Enzymes are considered to be generally of a protein nature although there are some exceptions (such as ribozymes, which are composed of RNA).

Enzymes act on a substrate that will become a different molecule and be called a product.

the cell cycle is the final answer! : )

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.