Operons are a common feature of bacterial genomes. Which of the following statements about the lac operon is correct? 1. The lac operon contains 3 stop codon sequences. 2. The lacz gene codes for lactose which is used as a source of energy. 3. A lacl mutant that can't bind to allolactose will inhibit the transcription of lacZ, lacY and lacA. 4. A lacOC mutant that keeps the operator constitutively ON (regardless of repressor binding), will inhibit the transcription of lacZ, lacY and lacA. O A. 1, 2 and 3 O B. 1 and 3 O C. 2 and 4 O D. 4 only O E. All of 1, 2, 3 and 4 are correct
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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