题目内容

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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DNA polymerase catalyzes the formation of a
phosphodiester bond between a（）DNA polymerase catalyzes the formation of a
phosphodiester bond between a（）

A. 5’phosphate and a5’hydroxyl
B. group
C. B．3’phosphate and a5’hydroxyl
D. group
E. C．5’phosphate and a3’hydroxyl
F. group
G. D．3’phosphate and a3’hydroxyl
H. group

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Many types of mammalian cancer cells are notable for
their（）Many types of mammalian cancer cells are notable for
their（）

A. telomerase activity
B. lack
C. of telomerase activity
D. C．lack
E. of telomeres
F. D．increased
G. number of telomeres

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During synthesis, all DNA polymerases add
nucleotides in which direction（）During synthesis, all DNA polymerases add
nucleotides in which direction（）

A. from
B. left to right
C. B．from3’to5’
D. C．from5’to3’
E. D．in
F. more than one direction at a time

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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（）

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

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）（）

DNA polymerase catalyzes the formation of aphosphodiester bond between a（）DNA polymerase catalyzes the formation of aphosphodiester bond between a（）

Many types of mammalian cancer cells are notable fortheir（）Many types of mammalian cancer cells are notable fortheir（）

During synthesis, all DNA polymerases addnucleotides in which direction（）During synthesis, all DNA polymerases addnucleotides in which direction（）

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

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）（）

DNA polymerase catalyzes the formation of a
phosphodiester bond between a（）DNA polymerase catalyzes the formation of a
phosphodiester bond between a（）

Many types of mammalian cancer cells are notable for
their（）Many types of mammalian cancer cells are notable for
their（）

During synthesis, all DNA polymerases add
nucleotides in which direction（）During synthesis, all DNA polymerases add
nucleotides in which direction（）