a) Eukaryotic chromosomes are much longer than bacterial ones and have multiple replication origins.
b) Antisense RNA is involved in regulating the copy number of many plasmids.
c) A host cell containing a lysogenic virus is lysogeny.
d) PCR can be used to identify an unknown sample of blood,tissue or hair.
e) Traces of DNA can be amplified by PCR and used for diagnosis and forensic analysis.