The flow of material through a reaction pathway usually depends on
(a)control of the first step of the pathway
(b)control at several steps in the pathway
(c)covalent modification of the enzyme that catalyzes the reaction
(d)feed-forward activation

Mg is used to measure mass

Closing a ring restricts the rotation around individual car bon carbon bonds hope it will you !

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature