A virus with a circular double-stranded DNA chromosome contains approximately 10,000 bp. You want to begin characterizing this chromosome by making a map of the cleavage sites of three restriction endonucleases: EcoRI, Hind III, and BamHI. You digest the viral DNA under conditions that allow the endonuclease reactions to go to completion and then subject the digested DNA to electrophoresis on agarose to determine the lengths of the restriction fragments produced in each reaction. Based on the resulting data, draw a map of the viral chromosome indicating the relative positions of the cleavage sites for these restriction endonucleases: Endonuclease EcoRI HindIII BamHI EcoRI+HindIII EcoRI + BamHI HindIII+BamHI EcoRI + HindIII + BamHI Length of fragments (kb) 6.9,3.1 5.1, 4.4, 0.5 10.0 3.6, 3.3, 1.5, 1.1, 0.5 5.1, 3.1, 1.8 4.4, 3.3, 1.8, 0.5 3.3, 1.8, 1.5, 1.1, 0.5
Bacterial Genomics
The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.
Transformation Experiment in Bacteria
In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.
Plasmids and Vectors
The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.
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