<P> There are two types of metabolic pathways that are characterized by their ability to either synthesize molecules with the utilization of energy ( anabolic pathway ) or break down of complex molecules by releasing energy in the process ( catabolic pathway ) . The two pathways complement each other in that the energy released from one is used up by the other . The degradative process of a catabolic pathway provides the energy required to conduct a biosynthesis of an anabolic pathway . In addition to the two distinct metabolic pathways is the amphibolic pathway , which can be either catabolic or anabolic based on the need for or the availability of energy . </P>
<P> There are two types of metabolic pathways that are characterized by their ability to either synthesize molecules with the utilization of energy ( anabolic pathway ) or break down of complex molecules by releasing energy in the process ( catabolic pathway ) . The two pathways complement each other in that the energy released from one is used up by the other . The degradative process of a catabolic pathway provides the energy required to conduct a biosynthesis of an anabolic pathway . In addition to the two distinct metabolic pathways is the amphibolic pathway , which can be either catabolic or anabolic based on the need for or the availability of energy . </P>
​ which metabolic reaction occurs when a cell uses energy
​ which metabolic reaction occurs when a cell uses energy
( anabolic pathway )
( anabolic pathway )