Chapter 12 Quiz 1

What would have happened if Avery had added an enzyme that digested all the nucleic acids to the mixture of heat-killed bacteria, added the mixture to harmless bacteria, and injected the mixture into mice?

What is inside a bacteriophage?

In what way is DNA like a book?

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

Which of the following is a nucleotide found in DNA?

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

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

Which scientist made x-ray diffraction photos of DNA?

What is the chronological order of the important discoveries in the structure of DNA?

Watson and Crick discovered the two strands in DNA

Which bacteria killed the mice in Griffin’s transformation experiment?

Griffith called the process he observed transformation because

What did Avery conclude caused transformation?

What do bacteriophages infect?

Why did Hershey and Chase label the viral DNA with radioactive phosphorous and not radioactive sulfur?

Which part of the bacteriophage in Figure 12–1 is the genetic material?

Figure 12–2 shows the structure of (not the structure labeled X, the whole figure.)

Because of base pairing in DNA, the percentage of

Which two bases pair together in DNA?

What would Hershey and Chase have concluded if both radioactive 32P and 35S were found in the bacteria in their experiment?

Bacteriophages inject protein into bacteria, altering the bacteria’s genetic information.

DNA is a nucleic acid made up of nucleosomes joined into long strands or chains by covalent bonds.

The three parts of a DNA nucleotide are the phosphate group, deoxyribose, and the base.

When Griffith destroyed the DNA in his mixture containing various molecules from heat-killed bacteria, transformation no longer occurred.

Watson and Crick discovered that covalent bonds hold base pairs together at the center of a strand of DNA.

The structure labeled X in Figure 12–2 is a(an) [blank_start]_________________________[blank_end].

The matching strand to the one in Figure 12–7, reading from the bottom up, would be [blank_start]_________________________[blank_end].

The Watson and Crick model of DNA is a(an) [blank_start]_________________________[blank_end], in which two strands are wound around each other.

In figure 12–8, the percentage of guanine would be [blank_start]_________________________[blank_end].

What stores information in a cell?

Interpret Visuals What process did Griffith identify in the series of experiments in Figure 12–11? [blank_start]d[blank_end]

Compare and Contrast In which experiments in Figure 12–11 do the mice live? [blank_start]d[blank_end]