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Cosmids has been constructed by combinin...

Cosmids has been constructed by combining certain features of plasmid and 'cos' sites of phage lambda.

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### Step-by-Step Solution: 1. **Understanding the Components**: - The term "Cosmid" is derived from two components: "cos" and "mid". - "Cos" refers to the "cos" sites of the lambda phage, which are specific sequences of DNA that allow the phage to package its DNA into a viral particle. - "Mid" comes from "plasmid", which is a small, circular piece of DNA that can replicate independently of chromosomal DNA in bacteria. 2. **Function of Cosmids**: ...
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