THE MOLECULAR BASIS OF INHERITANCE
RECOMBINANT DNA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I only
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I and II only
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II and III only
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I, II and III
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Detailed explanation-1: -Plasmids are extrachromosomal structures that have the ability to replicate on their own and are widely used as vectors in genetic engineering for gene transfer. For example-they can carry antibiotic-resistant genes and can spread them in the animal/plant body.
Detailed explanation-2: -Plasmids are physically separate from chromosomal DNA and replicate independently. They typically have a small number of genes-notably, some associated with antibiotic resistance-and can be passed from one cell to another.
Detailed explanation-3: -The incorrect statement about plasmids is that they are single-stranded (option D). Plasmids are Deoxyribonucleic Acid (DNA) circular threads present in certain bacterial species.
Detailed explanation-4: -Plasmids are extrachromosomal DNA, mostly present in bacteria. They replicate autonomously. The size varies from a few base pairs to thousands bp. Many antibiotic resistance genes are present in plasmids.