Cosmids are a Type Of

Question

Cosmids are a type of
A) bacterial artificial chromosomes (BACs).
B) cloning vector.
C) heat stable polymerase.
D) RNA/DNA hybrid.

Accepted Answer

Cosmids are a type of cloning vector, specifically a hybrid plasmid-phage vector. They contain a plasmid origin of replication and a lambda phage cos site, allowing for efficient packaging of large DNA fragments up to 50kb. They are commonly used for constructing genomic libraries and for gene cloning. They are not BACs, heat stable polymerase, or RNA/DNA hybrids.