Understand how genetics work

Complementarity is important in:
 a) replication
b) transcription
c) translation
d) all of the above
e) none of the above

Human insulin can be produced by bacteria, using human DNA.  This proves that:
a.    the genetic code is a heteropolymer specifying a single amino acid
b.    a new amino acid is transcribed from a nonsense mutation
c.     avirulent bacteria can be rendered infectious with exogenous DNA
d.    bacteria and humans must have similar coding dictionaries
e.    translation requires oligomeric proteins homologous to ribosomal tRNA