题目内容

Which type of DNA is duplicated by rolling circle
replication（）Which type of DNA is duplicated by rolling circle
replication（）

A. bacteriophage λ
B. plasmid
C. DNA
D. C．bacteriophage
E. Φ X174
F. D．all
G. of the above

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Which E. coli DNA polymerase has the
ability to“proofread” newly synthesized DNA and remove erroneous bases（）Which E. coli DNA polymerase has the
ability to“proofread” newly synthesized DNA and remove erroneous bases（）

A. DNA polymerase I only
B. DNA polymerase III only
C. DNA polymerase I and III
D. all
E. three DNA polymerases have proofreading ability

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To determine the number of replication sites in E.coliand whether replication is unidirectional or bidirectional, you examined the
results of two different experiments. Both experiments involved grTo determine the number of replication sites in E.coliand whether replication is unidirectional or bidirectional, you examined the
results of two different experiments. Both experiments involved gr

A. The
B. difference between the leading DNA strand and the lagging DNA strand
C. B．The difference between the replicated and
D. unreplicated portions of DNA
E. C．The
F. difference between the RNA primer and the newly synthesized DNA. The difference
G. between the replication fork and the newly synthesized DNA
H. D．None
I. of the above

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Which of the following is not required for DNA synthesis reactions（）

A. dCTPs
B. template DNA
C. DNA
D. polymerase
E. D．calcium
F. ions

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伦敦国王学院的（）研究小组用X-射线衍射的方法研究核酸的结构，并取得了很多有意义的成果

A. Maurice Wilkins
B. Rosalind Franklin
C. David
D. Baltimore
E. D．James Watson

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Which type of DNA is duplicated by rolling circlereplication（）Which type of DNA is duplicated by rolling circlereplication（）

A. bacteriophage λ B. plasmid C. DNA D. C．bacteriophage E. Φ X174 F. D．all G. of the above

Which E. coli DNA polymerase has theability to“proofread” newly synthesized DNA and remove erroneous bases（）Which E. coli DNA polymerase has theability to“proofread” newly synthesized DNA and remove erroneous bases（）

Which of the following is not required for DNA synthesis reactions（）

伦敦国王学院的（）研究小组用X-射线衍射的方法研究核酸的结构，并取得了很多有意义的成果

Which type of DNA is duplicated by rolling circle
replication（）Which type of DNA is duplicated by rolling circle
replication（）

A. bacteriophage λ
B. plasmid
C. DNA
D. C．bacteriophage
E. Φ X174
F. D．all
G. of the above

Which E. coli DNA polymerase has the
ability to“proofread” newly synthesized DNA and remove erroneous bases（）Which E. coli DNA polymerase has the
ability to“proofread” newly synthesized DNA and remove erroneous bases（）