Problem :
What is the name of the starting material of the citric acid cycle?
Acetyl-coenzyme A.
Problem :
What is the term used to describe a process that is both catabolic and anabolic?
Amphibolic.
Problem :
Why is the enzyme that catalyzes the conversion of pyruvate to acetyl-CoA called
the pyruvate dehydrogenase multienzyme complex?
The enzyme is given this name because it is really a group of
three
enzymes that work together to perform the reaction. Pyruvate dehydrogenase,
dihydrolipoyl transacetylase, and dihydrolipoyl dehydrogenase are the
three enzymes that make up the pyruvate dehydrogenase multienzyme complex.
Problem :
The enzyme pyruvate dehydrogenase performs a similar function to what glycolytic
enzyme? What type of reaction do these two enzymes catalyze?
Pyruvate decarboxylase, an enzyme involved in anaerobic
alcoholic
fermentation, catalyzes the removal of a carbon dioxide group similar to the
function of pyruvate dehydrogenase.
Problem :
What is the role of NAD in the conversion of pyruvate to acetyl-CoA?
NAD is responsible for re-oxidizing the lipoamide molecule that is used in the
second step of the reaction. In the reaction, NAD is converted to NADH.
