1. In a DNA sample of Escherichia coli (a bacteria), 23.6% of the nitrogenous bases are thymine. What percentage of cytosine nitrogen bases is present in this sample? a) 76.4% b) 23.6% c)26.4% d) 52.8%
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.
MULTIPLE CHOICE Read the questions below carefully. There is only one correct answer for each question.
1. In a DNA sample of Escherichia coli (a bacteria), 23.6% of the nitrogenous bases are thymine. What percentage of cytosine nitrogen bases is present in this sample?
a) 76.4%
b) 23.6%
c)26.4%
d) 52.8%
2. If the adenine is located on the Z strand as shown (see attachement 3) , then on the W strand, in the same place, we should find:
a) Uracil
b) Adenine
c) Thymine
d)Cytosine
3. Which of these deletions best represents a chromosomal deletion? (see options in attachment 3)
4. It is known that RNA is a
a) RNA is synthesized in the cell in case too large a mutation damages the DNA.
b) DNA has the reproductive genetic code of all cells and passes it on to RNA.
c) DNA directs the synthesis of enzymes, while RNA synthesizes proteins.
d) DNA synthesizes RNA according to a blueprint that includes the guidelines necessary for the structure of proteins.
5. How does nerve control differ from hormonal control?
a) It is controlled by hormones
b) He's faster.
c) It is less specific.
d) He is no longer loaned.
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