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Question
Which one of the following is used as a vector for cloning of genes into higher organisms?
Which one of the following is used as a vector for cloning of genes into higher organisms?
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Solution
The correct option is A Retrovirus
- A retrovirus is a single-stranded RNA virus that stores its nucleic acid in the form of an mRNA genome and targets a host cell as an obligate parasite.
- Once inside the host cell cytoplasm, the virus uses its own reverse transcriptase enzyme to produce DNA from its RNA genome, the reverse of the usual pattern.
- Thus, retroviruses function differently - their RNA is reverse-transcribed into DNA, which is integrated into the host cell's genome, and then undergoes the usual transcription and translational processes to express the genes carried by the virus.
- These are used as a vector for the cloning of genes into higher animals.
So, the correct answer is option A.
- A retrovirus is a single-stranded RNA virus that stores its nucleic acid in the form of an mRNA genome and targets a host cell as an obligate parasite.
- Once inside the host cell cytoplasm, the virus uses its own reverse transcriptase enzyme to produce DNA from its RNA genome, the reverse of the usual pattern.
- Thus, retroviruses function differently - their RNA is reverse-transcribed into DNA, which is integrated into the host cell's genome, and then undergoes the usual transcription and translational processes to express the genes carried by the virus.
- These are used as a vector for the cloning of genes into higher animals.
So, the correct answer is option A.
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