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Completion requirements
Opened: Monday, 23 October 2023, 11:45 PM
Due: Tuesday, 31 October 2023, 11:45 PM

Assignment 3 Answer the following questions based on the linked animations

1. . Evidence or approaches that led to the discovery of the DNA double helix include

a. The determination of structures using ball-and-stick models.

b. The X-ray diffraction data of Franklin.

c. The base composition data of Chargaff.

d. All of the above.

2. Which of the following is not a feature of the DNA double helix?

a. It obeys the AT/GC rule.

b. The DNA strands are antiparallel.

c. The structure is stabilized by base stacking.

d. All of the above are correct features of a DNA double helix.

3. A groove in the DNA refers to

a. The indentations where the atoms of the bases are in contact with the surrounding water.

b. The interactions between bases in the DNA.

c. The spiral structure of the DNA.

d. All of the above.

4. The complementarity of DNA strands is based on the

a. Chemical properties of a phosphodiester linkage.

b. the binding of proteins to the DNA.

c. AT/GC rule.

d. None of the above.

5. To make a new DNA strand, which of the following is necessary?

a. A template strand

b. Nucleotides

c. Heavy nitrogen

d. Both a and b

6. The model that correctly describes the process of DNA replication is the

a. Conservative model.

b. Semiconservative model.

c. Dispersive model.

d. All of the above.

7. A site in a chromosome where DNA replication begins is

a. A promoter.

b. An origin of replication.

c. An operator.

d. A replication fork.

8. In the lagging strand, DNA is made in the direction _________ the replication fork and is made as __________.

a. Toward, one continuous strand

b. Away from, one continuous strand

c. Toward, Okazaki fragments

d. Away from, Okazaki fragments

9. The proofreading function of DNA polymerase involves the recognition of a ________ and the removal of a short segment of DNA in the __________ direction.

a. Missing base, 5ʹ to 3ʹ

b. Base mismatch, 5ʹ to 3ʹ

c. Missing base, 3ʹ to 5ʹ

d. Base mismatch, 3ʹ to 5

10. To synthesize DNA, what does telomerase use as a template?

a. It uses the DNA in the 3ʹ overhang.

b. It uses RNA that is already a component of telomerase.

c. No template is used.

d. Both a and b are correct.

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