Which of the following is a of the benefit of a semi-conservative replication process（）
A. DNA can be quickly copied
B. This type of replication helps to minimizes mistakes
C. This type of replication requires fewer enzymes
D. There is no benefit
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What is the conformation of lambda phage DNA when it is isolated from the phage particle（）
A. Supercoiled
B. Open circular
C. Linear
D. Linear duplex
The cycle which is completed quickly in the infection by a phage is__（）
A. Lysogenic
B. Lytic
C. Replication
D. Capsid formation
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
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
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