Question

What are plasmids?

a) Naked genomic DNA

b) Smaller DNA than genomic DNA

c) Enveloped DNA

d) None of these​

Answer 1

Answer:

a genetic structure in a cell that can replicate independently of the chromosomes, typically a small circular DNA strand in the cytoplasm of a bacterium or protozoan. Plasmids are much used in the laboratory manipulation of genes.

Answer 2

correct answer is option b)

Explanation:

• Plasmids are extrachromosomal double stranded DNA molecule, smaller than the genomic DNA, physically separated from genomic DNA and replicate independently.
• Plasmid generally exist in bacteria, not surrounded by enveloped. they are naked.
• Plasmid are generally 1 to 200Kbp in size where as size of genomic DNA of a standard bacteria is 4.5 to5.5 Mb.
• So the correct answer is plasmids are smaller DNA than genomic DNA.