Metabolic Pathways Are Somewhat Like Roadways: a Metabolic Path May

Multiple Choice

Metabolic pathways are somewhat like roadways: A metabolic path may be one-way or two-way.It may contain intersections that connect many different pathways, or it may be isolated, with a dead end, and only connect to one other pathway.What roadway analogy could be used to describe the location of glyceraldehyde 3-phosphate (product of the Calvin cycle) in plant cell metabolism?

A) At the end of a dead-end street
B) At the intersection of two rarely traveled one-way streets
C) At the intersection of several busy superhighways
D) In the middle of a long heavily traveled road with no intersections
E) In the middle of a bridge that spans a very wide river