A Rapidly Dividing Cell Is Exposed to a Chemical That

question 37

Multiple Choice

A rapidly dividing cell is exposed to a chemical that converts the bond that forms between adenine and thymine to a covalent bond.Which of the following is most likely to occur?

• A) DNA replication would produce two molecules of DNA with mutations at every base that once held an A-T base pair.
• B) DNA replication would not occur because the two nucleotide strands that make up the DNA molecule would not be able to separate.
• C) DNA replication would occur more slowly because DNA repair proteins would have to fix the covalent bonds before replication could begin.
• D) DNA replication would be faster because covalent bonds require less energy to break than hydrogen bonds.

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