Which of the following statements about cellular metabolism is FALSE

A) Glycolysis is inhibited when cellular energy levels are abundant.
B) Citric acid cycle activity is dependent solely on availability of substrate; otherwise it is unregulated.
C) In the electron transport chain, electrons decrease in energy level as they are transferred from one electron carrier to the next.
D) Reactions of the citric acid cycle take place in the mitochondrial matrix.

Answer: B