1 Well, you never have to stop! 1 km = 2 * .5 km = 2 * .3 miles = 0.6 miles. 2  So 31 km = 18.6 miles. 3  However, remember this is only an approximation! 4  In this case, because 1 km is a small proportion of the overall figure, just round up to 32 km, which is 4 * 8 km = 4 * 5 miles.
Close. Reaction pathway. Enzymes can be involved at every step in a reaction pathway. At each step, the molecule is transformed into another form, due to the presence of a specific enzyme. Such a reaciton pathway can create a new molecule (biosynthesis), or it can break down a molecule (degradation).
Catabolic and Anabolic Reactions. The sum of all chemical reactions within a living organism is known as metabolism. Metabolic pathways are a series of chemical reactions in which the product of one reaction is the substrate for the next reaction.nabolism refers to chemical reactions in which simpler substances are combined to form more complex molecules. Anabolic reactions usually require energy. Anabolic reactions build new molecules and/or store energy. The energy of catabolic reactions is used to drive anabolic reactions.