DNA Replication

Which part of the bacteriophage contains genetic material?

• A

• B

• C

• D

What happens when a piece of DNA is missing?

• Genetic information is stored.

• Genetic information is copied.

• Genetic information is lost.

• Genetic information is transmitted.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In what way is DNA like a book?

• DNA has information organized with an kind of index.

• DNA has stored information, that can be copied and passed on.

• DNA has information wrapped in an identifying cover.

• DNA has information that is periodically updated.

Tags

NGSS.HS-LS1-1

Because of base pairing in DNA, the percentage of

• adenine molecules in DNA is about equal to the percentage of guanine molecules.
• thymine molecules in DNA is about equal to the percentage of adenine molecules
• adenine molecules in DNA is much greater than the percentage of thymine molecules.
• cytosine molecules in DNA is much greater than the percentage of guanine molecules.

The table in Figure 12–3 shows the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on Chargaff’s rule, the percentages of guanine bases in chicken DNA should be around

• 21.5%

• 19.9%

• 13.4%

• 28.8%

Based on Chargaff’s rule, the percentage of cytosine in the DNA of the bacterium, S. Lutea in Figure 12–3, should be around

• 26.6%.

• 73.2%.

• 36.6%.

• 29.4%.

Which of the following statements correctly describes Chargaff’s contribution to the study of DNA?

• Chargaff hypothesized that DNA was a double helix, but he did not produce the image that proved this fact.
• Chargaff’s experiments conclusively proved that DNA was made of nucleotides, but he could not show that there four types of nitrogenous bases.
• Chargaff showed that adenine and thymine were found in equal percentages in DNA, but he did not know this was because of base-pairing.
• Chargaff’s work proved that DNA could be made using radioactive nucleotides, but he did not show that DNA could be transferred from one organism to another.

Tags

NGSS.HS-LS1-1

Which scientist(s) figured out that the shape of a DNA molecule is a double helix?

• Hershey and Chase

• Griffith

• Watson and Crick

• Franklin

Tags

NGSS.HS-LS1-1

Which scientist made x-ray diffraction photos of DNA?

• Franklin

• Chargaff

• Watson

• Avery

Which of the following forms a base pair with thymine?

• deoxyribose
• adenine
• guanine
• cytosine