DNA replication Quiz
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5 questions, one answer each
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1. Which enzyme joins adjacent nucleotides in the new DNA strand?
- A. DNA helicase
- B. RNA polymerase
- C. DNA polymerase
- D. Amylase
2. Meselson and Stahl found a single intermediate band after one generation. What does this show?
- A. Every molecule had one old and one new strand
- B. Every molecule was entirely new
- C. The DNA was not replicated
- D. Replication is conservative
3. Which is the best description of the new strand in semi-conservative replication?
- A. It is made from RNA nucleotides
- B. It is the same as the template strand
- C. It is a copy of the other new strand
- D. It is complementary to the template strand it is built on
4. What percentage of DNA molecules contain 15N after three generations in 14N, if replication is semi-conservative?
- A. 12.5%
- B. 25%
- C. 50%
- D. 75%
5. Which bonds are broken by DNA helicase?
- A. Phosphodiester bonds
- B. Peptide bonds
- C. Hydrogen bonds between bases
- D. Covalent bonds in the sugar