题目内容

During replication, proofreading of the newly
synthesized DNA is performed by（）During replication, proofreading of the newly
synthesized DNA is performed by（）

A. RNA
B. polymerase
C. B．reverse
D. transcriptase
E. C．topoisomerase
F. D．DNA
G. polymerase

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Based on the experiments in this activity, which of
the following is true about E. coli replication（）Based on the experiments in this activity, which of
the following is true about E. coli replication（）

A. Replication begins at a single site on the
B. chromosome
C. B．Replication
D. is bidirectional
E. C．Synthesis
F. begins at specific sites on the template strand
G. D．All
H. of the above

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Prokaryotic chromosomes consist mostly of（）

A. unique
B. sequence DNA only
C. B．repetitive
D. sequence DNA only
E. C．either
F. unique sequence or repetitive sequence DNA
G. D．both
H. unique sequence and repetitive sequence

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At the conclusion of DNA replication, the two
resulting DNA double helices each contain（）At the conclusion of DNA replication, the two
resulting DNA double helices each contain（）

A. one parental
B. and one progeny strand
C. B．two
D. parental or two progeny strands
E. C．stretches
F. of progeny DNA interspersed with parental DNA along both strands
G. D．two
H. newly synthesized strands

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The X-ray diffraction data obtained by Rosalind
Franklin suggested （choose the correct answer）（）The X-ray diffraction data obtained by Rosalind
Franklin suggested （choose the correct answer）（）

A. DNA
B. is a helix with a pattern that repeats every 3.4 nanometers
C. B．Purines
D. are hydrogen bonded to pyrimidines
E. C．DNA
F. is a left-handed helix
G. D．DNA
H. is organized into nucleosomes

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During replication, proofreading of the newlysynthesized DNA is performed by（）During replication, proofreading of the newlysynthesized DNA is performed by（）

A. RNA B. polymerase C. B．reverse D. transcriptase E. C．topoisomerase F. D．DNA G. polymerase

Based on the experiments in this activity, which ofthe following is true about E. coli replication（）Based on the experiments in this activity, which ofthe following is true about E. coli replication（）

Prokaryotic chromosomes consist mostly of（）

At the conclusion of DNA replication, the tworesulting DNA double helices each contain（）At the conclusion of DNA replication, the tworesulting DNA double helices each contain（）

The X-ray diffraction data obtained by RosalindFranklin suggested （choose the correct answer）（）The X-ray diffraction data obtained by RosalindFranklin suggested （choose the correct answer）（）

During replication, proofreading of the newly
synthesized DNA is performed by（）During replication, proofreading of the newly
synthesized DNA is performed by（）

A. RNA
B. polymerase
C. B．reverse
D. transcriptase
E. C．topoisomerase
F. D．DNA
G. polymerase

Based on the experiments in this activity, which of
the following is true about E. coli replication（）Based on the experiments in this activity, which of
the following is true about E. coli replication（）

At the conclusion of DNA replication, the two
resulting DNA double helices each contain（）At the conclusion of DNA replication, the two
resulting DNA double helices each contain（）

The X-ray diffraction data obtained by Rosalind
Franklin suggested （choose the correct answer）（）The X-ray diffraction data obtained by Rosalind
Franklin suggested （choose the correct answer）（）