Self Quiz for DNA Replication

Study the material in this section and then write out the answers to these question.
Do not just click on the answers and write them out. This will not test your understanding of this tutorial.

1. Briefly describe the process of DNA replication. (ans)

2. State what enzyme carries out the following functions during DNA replication.

a. Unwinds the helical DNA by breaking the hydrogen bonds between complementary bases. (ans)
b. Synthesizes a short RNA primer at the beginning of each origin of replication. (ans)
c. Adds DNA nucleotides to the RNA primer. (ans)
d. Digests away the RNA primer and replaces the RNA nucleotides of the primer with the proper DNA nucleotides. (ans)
e. Links the DNA fragments of the lagging strand together. (ans)

3. The DNA strand replicated in short fragments called Okazaki fragments is called the:

a. lagging strand (ans)
b. leading strand (ans)

4. State which cell type has multiple origins of replication in its genome.

a. prokaryotic (ans)
b. eukaryotic (ans)

5. Identify the following stages of mitosis.

a. During this final stage of mitosis, the nuclear membrane and nucleoli reform, cytokinesis is nearly complete, and the chromosomes eventually uncoil to chromatin. (ans)
b. Refers to all stages of the cell cycle other than mitosis. During this phase, cellular organelles double in number, the DNA replicates, and protein synthesis occurs. The chromosomes are not visible and the DNA appears as uncoiled chromatin. (ans)
c. During this phase of mitosis, the nuclear membrane fragmention is complete and the duplicated chromosomes line up along the cell's equator. (ans)
d. During the first stage of mitosis, the chromatin condenses and the chromosomes become visible. Also the nucleolus disappears, the nuclear membrane fragments, and spindle fibers are assembled. (ans)
e. During this phase of mitosis, diploid sets of daughter chromosomes move toward opposite poles of the cell and cytokinesis (cytoplasmic cleavage) begins. (ans)

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