Metabolism Mastering Flashcards
Why do all enzymatic reactions need activation energy?
Energy is required to disrupt a substrate’s stable electron configuration.
What is meant by the statement “Enzymes are biological catalysts”?
Enzymes speed up the chemical reactions in living cells.
Why are enzymes important to biological systems?
Enzymes decrease the amount of activation energy required for chemical reactions to occur.
How does a noncompetitive inhibitor reduce an enzyme’s activity?
The inhibitor binds to the enzyme in a location other than the active site, changing the shape of the active site.
What would be the likely outcome if you increased the concentration of substrate for an enzyme in the presence of a noncompetitive inhibitor?
No change in enzyme activity would be observed.
How is nevirapine used to treat HIV infections?
It alters the active site of reverse transcriptase, decreasing that enzyme’s activity.
Why is reduction the term used to describe the gain of an electron?
The electron acceptor’s net charge decreases.
what are coenzymes
organic cofactors important to enzyme activity.
Which of the following terms refers to pathways that can function both in anabolism and catabolism?
amphibolic pathways
example of anabolism.
pentose phosphate pathway
oxidative phosphorylation is what
a catabolic process
The reactions that occur between glucose and pyruvic acid
can either be anabolic or catabolic
In metabolism, energy that is not used
is given off as heat
The reactions involved in producing larger compounds from smaller compounds is called
anabolism
Where does the energy required for anabolic reactions come from?
catabolic reactions
