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DNA Structure & 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. Which of the following enzymes is in charge of unwinding the DNA double helix?

Question 2 2.

Using the given information, determine the correct order of the following events during the replication of the lagging strand.

a. The DNA double helix unwinds.

b. The Okazaki fragments are joined.

c. The RNA primase builds an RNA primer on the parent strand.

d. Nucleotides are added and matched to the parent strand.

Question 3 3. The replication of DNA is a complex process; all of the following statements are correct, EXCEPT

Question 4 4. DNA arranged in nucleosomes is called _____.

Question 5 5. Active DNA that is part of interphase chromatin is called _____.

Page 2

Question 6 6. Silenced DNA that is part of interphase chromatin is called _____.

Question 7 7. Because hydrogen bonds are weak bonds, they create a perfect site for _____.

Question 8 8. The location where the process of DNA replication begins is called the _____.

Question 9 9. Why is it necessary that the DNA helicase unwinds the DNA?

Question 10 10. Spindle poles were formerly known as which one of the following?

Page 3

Question 11 11. The spindle fibers form during this phase of cell division.

Question 12 12. The microtubules of the spindle fibers do this to pull the chromosomes into their respective chromatids.

Question 13 13. Why can't DNA polymerase work continuously on both parent strands?

Question 14 14. Why do we call DNA an antiparallel molecule?

Question 15 15. Which of the parent DNA strands is replicated discontinuously?

Page 4

Question 16 16. What kind of organism was used to investigate the method of DNA Replication?

Question 17 17. How is the N-15 isotope different from the N-14 atom?

Question 18 18. The Dispersive method of DNA Replication was disproved when the scientists observed...

Question 19 19. Which of the following statements is true?

Question 20 20. The sugar end of the DNA strand is referred to as the _____ end and the phosphate end is referred to as the _____ end.

Page 5

Question 21 21. Which of the following bases are categorized as purines?

Question 22 22. A discrete unit of DNA that produces a protein that provides the functionality a cell needs is _____.

Question 23 23.

Place the following terms in order building out from the most basic subunit to the entire genetic unit:

I. Gene

II. DNA

III. Chromatin

IV. Nucleosome

Question 24 24.

Which of the following roles in the cell could non-coding DNA perform?

I. Provide structural support at the end of chromosomes.

II. Encode a protein that will play a significant role in cell division.

III. Serve functional purposes.

Question 25 25. Which word part is used to designate that a molecule is an enzyme?

Page 6

Question 26 26. What is the purpose of the RNA primer?

Question 27 27. What are the small components (monomers) that make up the large DNA polymer?

Question 28 28. Which of the following forms the backbone of a DNA molecule?

Question 29 29. How many basic types of nucleic acids exist?

Question 30 30. A phosphodiester bond links:

DNA Structure & 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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