The biosynthesis of ubiquinone, whose structure is shown here, uses phenylalanine or tyrosine to build the benzoquinone ring, while the decaisoprenoid tail comes from the same pathway that is used for the biosynthesis of cholesterol. Given this knowledge, predict the following.

a. What is the source of the C atoms in the decaisoprenoid tail of ubiquinone?

b. Do you predict that giving someone statins would tend to diminish the biosynthesis of ubiquinone?