Answer
417.6k+ views
Hint: An extracurricular circular DNA present in the bacteria that is used to transfer foreign DNA into a suitable host and also used to make multiple copies of foreign DNA.
Complete answer:
For the transferring of foreign DNA fragments into a suitable host, a vector is used. If that vector is used to make multiple copies of that transferred DNA it is called a cloning vector. Bacteriophages, plasmids are commonly used vectors. All the bacterial cells contain extrachromosomal DNA that can be easily removed is used as a vector.
Additional Information: - In the DNA hybridization technique, a foreign DNA fragment is inserted to make the desired DNA. This foreign DNA is transferred with the use of vectors. They are also used for making multiple copies of foreign DNA that is transferred into a suitable host. They are called cloning vectors.
- Generally, vectors are taken from the living organisms especially from microorganisms like bacteria. They contain extrachromosomal circular DNA called plasmid which is used as a cloning vector.
- Bacteriophages are the organisms that attack bacteria which can also be used as vectors.
- In cosmids, the cos site of the phage is incorporated into the plasmid.
- In order to cut the desired part of a DNA, various enzymes are used. They are called restriction endonucleases.
So, the correct answer is ‘ a plasmid or other agent used to transfer DNA into a living cell’.
Note: Nowadays artificial vectors also developed the same as plasmids. For example, pBR322 is an artificial vector developed by Bolivar and Rodriguez. The BR in the name is named after these two scientists. Another artificial vector is pUC19,101 developed by the University of California.
Complete answer:
For the transferring of foreign DNA fragments into a suitable host, a vector is used. If that vector is used to make multiple copies of that transferred DNA it is called a cloning vector. Bacteriophages, plasmids are commonly used vectors. All the bacterial cells contain extrachromosomal DNA that can be easily removed is used as a vector.
Additional Information: - In the DNA hybridization technique, a foreign DNA fragment is inserted to make the desired DNA. This foreign DNA is transferred with the use of vectors. They are also used for making multiple copies of foreign DNA that is transferred into a suitable host. They are called cloning vectors.
- Generally, vectors are taken from the living organisms especially from microorganisms like bacteria. They contain extrachromosomal circular DNA called plasmid which is used as a cloning vector.
- Bacteriophages are the organisms that attack bacteria which can also be used as vectors.
- In cosmids, the cos site of the phage is incorporated into the plasmid.
- In order to cut the desired part of a DNA, various enzymes are used. They are called restriction endonucleases.
So, the correct answer is ‘ a plasmid or other agent used to transfer DNA into a living cell’.
Note: Nowadays artificial vectors also developed the same as plasmids. For example, pBR322 is an artificial vector developed by Bolivar and Rodriguez. The BR in the name is named after these two scientists. Another artificial vector is pUC19,101 developed by the University of California.
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