Q1. Ciprofloxacin, erythromycin, and acyclovir are used to treat microbial infections. Ciprofloxacin inhibits DNA gyrase. Erythromycin binds in front of the A site on the 50S subunit of a ribosome. Acyclovir is a guanine analog.

What steps in protein synthesis are inhibited by each drug?
Which drug is more effectual against bacteria? Why?

Which drug is more successful against viruses? Why?

Which drugs will have effects on the host’s cells? Why?

Utilize the index to identify the disease for which acyclovir is used. Why is it more effectual than erythromycin for treating this disease?

Q2. Explain physiological changes that occur in three different organ systems when food is ingested and how these systems coordinated a response in the human body.