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What is true for plasmid?

1. Plasmids are widely used in gene transfer.
2. These are found in virus.
3. Plasmid contains gene for vital activities.
4. These are main part of chromosome.

Correct answer: Plasmids are widely used in gene transfer.

Solution

Plasmids are small, circular DNA molecules that can carry foreign DNA into cells, so they are commonly used as vectors in gene transfer. They are not the main part of chromosomes, and they usually do not contain genes for vital cellular activities.

Related NEET Biology questions

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