题目内容

Which of the following statements is NOT typically true of a plasmid()

A. It inserts the gene of interest into the bacterial chromosome
B. It is a circular molecule DNA
C. It can be used as a vector to clone DNA
D. It has cleavage sites for restriction nucleases
E. It has a selectable property, such as antibiotic resistance

查看答案
更多问题

The number of molecules of an individual plasmid that are normally found in a single bacterial cell is known as()

A. Conjugative ability
B. Copy number
Competency
D. Replicative ability

What is an advantage of using a bacteriophage, compared with a plasmid()

A. Phages can be used to kill bacteria, and sterilize an area
B. Plasmids do not contain restriction sites
C. Bacteriophages can carry much longer DNA fragments than plasmids
D. Bacteriophages can carry smaller fragments than plasmids
E. Plasmids will not reproduce within bacteria

Once the recombinant plasmid is taken up by a host (E.coli), what must a researcher do()

A. Insert the DNA into a phage
B. Raise the host cells and select colonies containing the plasmid
C. Use one or more restriction enzymes
D. Ligate the DNA fragment to the plasmid

What are cosmid vectors()

A. Hybrid between phage and plasmid
B. Hybrid between M13 and lambda phage
C. Modified lambda vector
D. Modified M13 vector

答案查题题库