DNA & RNA

What did Avery conclude caused transformation?

• DNA was the transforming factor

• A protein was the transforming factor

• A carbohydrate was the transforming factor

• A lipid was the transforming factor.

What property of DNA does bacterial transformation illustrate?

• Bacterial DNA cannot move into other bacteria and function

• Bacterial DNA can move into another bacteria and function

• Bacterial DNA uses four nucleotide bases that work in pairs

• Bacterial DNA is found in a circular chromosome

What do bacteriophages infect?

• mice

• humans

• viruses

• bacteria

Which part of the bacteriophage in Figure 12-1 contains genetic material?

• A

• B

• C

• D

In which cells is the accurate transmission of information most important?

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Because of base pairing in DNA, the percentage of...

• adenine in DNA is equal to the percentage of guanine

• thymine in DNA is equal to the percentage of adenine

• adenine in DNA is greater than the percentage of thymine

• cytosine in DNA is greater than the percentage of guanine

What structural problem prevents adenine from pairing with guanine?

• Each makes 2 hydrogen bonds

• One base makes 1 hydrogen bond and the other bases makes 2 hydrogen bonds

• Each base makes 3 hydrogen bonds

• One base makes 2 hydrogen bonds and the other base makes 3 hydrogen bonds

Which scientist made x-ray diffraction photos of DNA?

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DNA replication results in two DNA molecules,

• each with 2 new strands

• one with 2 new strands and the other 2 original strands

• each with 1 new strand and 1 original strand

• each with 2 original strands

What is adding base pairs to the strand in figure 12-5?

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