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Plasmids that carry genes to provide res...

Plasmids that carry genes to provide resistance to antibiotics are called :

A

R-plasmids

B

C-plasmids

C

A-plasmids

D

Ti-plasmids

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The correct Answer is:
A
R-plasmids confer antibiotic resistance on bacteria. These possess genes that code for enzymes capable of destroying or modifying antibiotic such as ampichillin, chloramphenicol and kanamycin.
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Assertion: The genes encoding resistance to antibiotices are considered as useful selectable markers for E.coli Reason :The normal E.coli does not carry resistance against any of the antibiotics

How many of the given statements are not incorrect? I. The plasmid is autonomously replicating circular extra-chromosomal DNA. II. Ligase enzyme belongs to a larger class of enzymes called nucleases. III. DNA fragments are negatively-charged molecules. IV. E.coli always has genes encoding resistance to antibiotics such as ampicillin and chloramphenicol.

If a recombinant DNA bearing gene for resistance to antibiotic ampicillin is transferred to E.coli cells, the host cells become transformed into ampicillin resistant cells. If such bacteria are transferred on agar plates containing ampicillin, only transformants will grown and the untransformed recipient cells will die. The ampicillin resistant gene in this case is called as

In bacteria this structure confers resistance to antibiotics

Genes for antibiotic resistance located in Or Bacterial resistance to antibiotics is a genetic trait, it is normally carried by the

Genes for antibiotic resistance as found in bacteria are located on

What is antibiotic resistance ?

GRB PUBLICATION-BIOTECHNOLOGY : PRINCIPLES AND PROCESSES-Exemplar Problems
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  17. A bacterial cell was transformed with a recombinant DNA that was gener...

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  19. Who among the following was awarded the Nobal Prize for the developmen...

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