FIGURE 9.22 A DNA Microarray This is an example of an array used to study gene expression. Two different CDNA samples (one labeled with a red fluorescent marker and the other with a green fluorescent marker) were simultaneously hybridized to fragments in the microarray. Red dots indicate the positions to which one sample hybridized, and green dots indicate the positions to which the other hybridized. Yellow dots indicate that both samples hybridized.
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.
How can DNA microarrays be used to determine which genes of a bacterial pathogen are expressed both inside and outside of a host cell?
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