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).
Figure 3. The pathway of tryptophan biosynthesis in E. coli. The pathway is regulated by the process of feedback inhibition. Tryptophan (trp), the end product of the pathway, is the effector molecule that binds to the allosteric site of Enzyme a, the first enzyme in the pathway.igure 3. The pathway of tryptophan biosynthesis in E. coli. The pathway is regulated by the process of feedback inhibition. Tryptophan (trp), the end product of the pathway, is the effector molecule that binds to the allosteric site of Enzyme a, the first enzyme in the pathway.