Which of the Following Describes a Function of the DNA

question 22

Multiple Choice

Which of the following describes a function of the DNA helicase?

• A) connects the Okazaki fragments and seals any breaks in the sugar-phosphate backbone
• B) adds nucleotides to the growing 3' end of the new DNA strand
• C) creates the lagging strand in semiconservative replication
• D) unwinds and "unzips" the double-stranded DNA by breaking the weak hydrogen bonds between the paired bases
• E) re-creates the broken hydrogen bonds so that DNA becomes double-stranded again

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