Chapter 12

Biology: How Life Works · 7 exercises

Problem 1

Explain how DNA structure itself suggests a mechanism of DNA replication.

5 step solution

Problem 2

Explain how the chemical structure of deoxynucleotides determines the orientation of the DNA strands and how this affects the direction of DNA synthesis.

5 step solution

Problem 3

List the differences and similarities in the way the two daughter strands of DNA are synthesized at a replication fork.

8 step solution

Problem 4

Explain why replicating the tips of linear chromosomes is problematic and how the cell overcomes this challenge.

4 step solution

Problem 5

Describe what PCR does. Name and explain its three steps and give at least two uses for the PCR technique.

5 step solution

Problem 6

Explain how the properties of DNA determine how it moves through a gel, is cut by restriction enzymes, and hybridizes to other DNA strands.

3 step solution

Problem 8

Describe how recombinant DNA techniques can be used to express a mammalian gene in bacteria.

5 step solution

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