Plasmids are small circular dna molecules found in bacteria that replicate separately from chromosomes. why are plasmids essential for recombinant dna technology?

This is because DNA from a gene of interest can be inserted into a plasmid, then the modified plasmid can be inserted into a bacterial cell to make many copies of a gene of interest. Most plasmid vectors contain little more than the essential nucleotide sequences required for their use in DNA cloning: a replication origin, a drug-resistance gene, and a region in which exogenous DNA fragments can be inserted.

answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

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