Q1. Despite best efforts, hospitals are unable to decrease nosocomial infection rate to zero.

What are some reasons why there will always be some nosocomial infections?

Q2. The new form of life is discovered. It has a genetic code much like that of organisms on Earth except that there are five different DNA bases instead of four and the base sequences is translated as doublets instead of triplets. How various different amino acids might be accommodated by this genetic code?