Phenotypic Variation 1. What was the effect of medium type on pigmentation in strain 30-84 and 30-847? What is the difference between these strains? 2. The availability of iron (Fe3+) in the environment is very low (~1 x 10-17 M). Therefore, siderophore production by bacteria can be critical for successful growth in nature. Many bacteria in nature produce siderophores, and often one bacterium will out-compete another bacterium for iron. What could explain this observation? 1111 3. How do skim milk plates allow detection of proteases? How does semi-solid motility agar allow for the detection of motility?
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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