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Praxis Biology: DNA and Replication Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Where are hydrogen bonds located within the DNA?

Question 2 2. Why is it necessary that the DNA helicase unwinds the DNA?

Question 3 3. When DNA helicase separates the two parental strands, it creates a Y-shape called a _____.

Question 4 4. Which of the following forms the backbone of a DNA molecule?

Question 5 5. How many replication forks are contained in each replication bubble?

Page 2

Question 6 6. In which method of DNA Replication would all parent DNA be conserved in the original molecule?

Question 7 7. What happens to the RNA primer once DNA replication is begun by DNA polymerase?

Question 8 8. Which of the parent DNA strands is replicated discontinuously?

Question 9 9. Why can't DNA polymerase work continuously on both parent strands?

Question 10 10. In which method of DNA Replication would new DNA consist of alternating parent and daughter DNA?

Page 3

Question 11 11. Which of the following BEST explains the role of DNA polymerase?

Question 12 12. How many rounds of DNA Replication were needed to disprove the Conservative method?

Question 13 13. Which is the enzyme that builds the RNA primer?

Question 14 14. How many basic types of nucleic acids exist?

Question 15 15. Who performed the experiment that proved semi-conservative DNA replication was correct?

Page 4

Question 16 16. Which of the following statements is true?

Question 17 17. What is the cellular process in which a new copy of DNA is created?

Question 18 18. Which of the following bases are categorized as purines?

Question 19 19.

Which of the following are ways in which RNA is different than DNA:

I. Single-stranded

II. Ribose

III. Uracil

Question 20 20. What is the purpose of the RNA primer?

Page 5

Question 21 21. Why do we call DNA an antiparallel molecule?

Question 22 22.

Which of the following is a primary function of a nucleic acid?

I. Structural support

II. Storage of information

III. Energy storage

Question 23 23. The replication of DNA is a complex process; all of the following statements are correct, EXCEPT

Question 24 24. The location where the process of DNA replication begins is called the _____.

Question 25 25. A phosphodiester bond links:

Page 6

Question 26 26. Which of the following statements is true?

Question 27 27.

Which of the following are reasons why RNA is generally less stable than DNA?

I. Fewer hydrogen bonds

II. Prevalence of proteins that can degrade RNA

III. Fewer -OH groups in the sugar of RNA

Question 28 28. Which word part is used to designate that a molecule is an enzyme?

Question 29 29. Why does N-15 DNA sink to a lower level than N-14 in a centrifuge tube?

Question 30 30. A nucleic acid monomer is called:

Praxis Biology: DNA and Replication Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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