Q6. The bacterium Rhizobium radiobacter is well known to biologists because it has the rather astonishing ability to cause natural genetic engineering. That is, several genes are moved from the bacterial cells directly into the nucleus of cells of many higher plant species. Expression of these transferred genes in the infected plants stimulates cell division, creating a mass of undifferentiated tissue. Which of the following signals on these transferred genes could be recognized in the plant host cell but not in the original Rhizobium cell? “TATA” box transcription terminator hairpin loop intron splice signals SD box A. 1, 2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1, 2, 3 and 4
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.
Q6. The bacterium Rhizobium radiobacter is well known to biologists because it has the rather astonishing ability to cause natural genetic engineering. That is, several genes are moved from the bacterial cells directly into the nucleus of cells of many higher plant species. Expression of these transferred genes in the infected plants stimulates cell division, creating a mass of undifferentiated tissue.
Which of the following signals on these transferred genes could be recognized in the plant host cell but not in the original Rhizobium cell?
- “TATA” box
- transcription terminator hairpin loop
- intron splice signals
- SD box
A. 1, 2 and 3
B. 1 and 3
C. 2 and 4
D. 4 only
E. All of 1, 2, 3 and 4
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