Question

From which bacterium the REN-Sal-I is isolated?
(a) Escherichia coli
(b) Streptococcus aureus
(c) Haemophilus influenzae
(d) Streptomyces albus

Answer 1

Bacteria are a type of biological cell (common noun bacteria, singular bacterium). They are a large group of prokaryotic microorganisms. Bacteria are typically a few micrometers long and come in a variety of shapes, including spheres, rods, and spirals. Bacteria were among the first life forms to appear on Earth and can be found in nearly every habitat.

Complete answer:
Recombinant DNA is made up of DNA molecules from two different species that are inserted into a host organism to create new genetic combinations that are useful in science, medicine, agriculture, and industry. Because the gene is the focal point of all genetics, the primary goal of laboratory geneticists is to isolate, characterize, and manipulate genes.
A restriction enzyme, restriction endonuclease, or restricts is an enzyme that cleaves DNA into fragments at or near specific recognition sites known as restriction sites within molecules. Restriction enzymes are a subset of the larger endonuclease enzyme family. Restriction enzymes are commonly classified into five types based on their structure and whether or not they cut their DNA substrate at their recognition site, or if the recognition and cleavage sites are separate from one another.
All restriction enzymes cut DNA by making two incisions, one through each sugar-phosphate backbone (i.e. each strand) of the DNA double helix.
Option A: Escherichia coli: The enzymes S-adenosylhomocysteine nucleosidase, lysine decarboxylase, arginine decarboxylase, glutamic decarboxylase, formic hydrogenlyase, formic oxidase, and glucose oxidase from Escherichia coli were studied during a disruption in a Servall-Ribi refrigerated cell fractionator.
Option B: Streptococcus aureus: When Staphylococcus aureus is isolated from an abscess, boil, or another skin lesion, it is usually as a result of its second invasion of a wound rather than as the primary cause of disease. Similarly, S. aureus can be isolated from abscesses, breast abscesses or mastitis, dermatitis or skin infections, and genital tract infections.
Option C: Haemophilus influenzae: Bacterial species that produce IgA1 proteases, such as Haemophilus influenzae, secrete this enzyme into their environment. However, after isolating the gene encoding this protein from H.
Option: D: Streptomyces albus: The restriction enzymes are isolated from bacterial sources and named after the bacterial species that produced them. Sal I is an enzyme isolated from the bacterium Streptomyces albus. The first enzyme isolated from the bacterium is this one.
Thus, the answer is option D: Streptomyces albus.

Note: A clone is a group of individual cells or organisms descended from a single progenitor in biology. Because cell replication produces identical daughter cells each time, members of a clone are genetically identical.