Manufacturing recombinant DNA molecules involves cutting a gene from its normal location, inserting it into a circular piece of
DNA from a bacterial cell, and then transferring the circle of DNA to cells of another species. Which of the below describes the circular piece of DNA from a bacterial cella) restriction enzyme b) plasmid
c) bacteriophage
d) vector
A plasmid is an extrachromosomal DNA molecule that found in a cell that replicates independently without the need for chromosomes. A plasmid is small and is also not attached to the chromosomal DNA. Generally, plasmids are a circular piece of double stranded DNA materials that are present in bacteria.
Plasmids are used in a molecular biology laboratory for gene manipulation. they are able to transfer genes to a DNA through DNA recombinant technology and also aid DNA replication in bacteria. Plasmids are also used to study antibiotic resistance.
Their skin color was dark which made the moths blend in. During the Industrial Revolution, the soot from factories caused the trees to become black. The light colored moths became easier to kill because they could not blend into their environment.