Question

Glycolytic reactions can either be described as reversible or irreversible. Looking at all 10 reactions in glycolysis, what conclusions can you make about irreversible reactions in general?

Choose one or more:

A. The activity of the enzymes that catalyze irreversible reactions can be increased or decreased.
B. They operate far from equilibrium.
C. If the reaction involves ATP, it is an irreversible reaction.
D. The enzymes that catalyze these reactions are not shared in opposing pathways (i.e., glycolysis and gluconeogenesis).

Answer 1

Answer: Options A and D

A) The activity of the enzymes that catalyze irreversible reactions can be increased or decreased.

D) The enzymes that catalyze these reactions are not shared in opposing pathways (i.e., glycolysis and gluconeogenesis).

Explanation:

Option B is wrong. The irreversible reactions in glycolysis are 3 out of the 10, and these 3 occurs next to equilibrium or reversible reactions

Option C is also wrong. If the reaction involves ATP, it could be a reversible or irreversible reaction.