Controls V-P Positive control: Enterobacter aerogenes or
Klebsiella pneumoniae V-P Negative control: Escherichia coli.
1.8. BACTERIAL GENETICS Genetics is the study of inheritance. characteristics are encoded in DNA. Bacteria have two types of DNA that contain their genes. These are : Bacterial inherited
. Chromosome . Extra chromosome: Plasmid
The bacterial chromosome is circular, double stranded DNA attached to bacterial cell membrane. DNA replication in bacteria is semi-conservative i.e. each strand of DNA is conserved intact during replication and becomes one of the two strands of the new daughter molecules.