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1.
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Before the 1940s, scientists thought that genetic material was most
likely
a. | DNA, because the nucleotides can combine in many different ways. | b. | RNA, because it is a
single-stranded molecule. | c. | proteins, because of their wide range of
functions. | d. | lipids, because of their role in making up the membranes of all
cells. |
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2.
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In Griffith’s experiment, he injected _____ into _____ in order to
determine that genetic material was able to pass between cells.
a. | viruses; mice | c. | viruses; bacteria | b. | bacteria; mice | d. | bacteria;
humans |
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3.
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What is a bacteriophage?
a. | pathogenic bacterium | c. | a prokaryotic cell that engulfs other
prokaryotes | b. | protist that consumes bacteria | d. | virus that infects
bacteria |
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4.
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How did Hershey and Chase identify the nucleic acids and proteins in their
experiment?
a. | proteins were labeled with radioactive sulfur and nucleic acids with radioactive
phosphorus | b. | proteins were labeled with radioactive phosphorus and nucleic acids with radioactive
sulfur | c. | proteins were labeled with radioactive amino acids and nucleic acids with radioactive
ribose | d. | proteins were labeled with radioactive carbon and nucleic acids with radioactive
nitrogen |
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5.
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Which of the following are considered Chargaff’s rules? Choose
all that apply.
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6.
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How did X-ray crystallography contribute to scientists’ understanding of
the structure of DNA?
a. | the diffraction patterns created by purified DNA molecules suggested a helical
shape | b. | it allowed scientists to see the actual DNA molecule and determine its
structure | c. | it caused the four bases in DNA to glow differently and therefore show how they pair
up | d. | it showed that all nucleotides were made of a sugar molecule, a nitrogen base, and a
phosphate group |
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7.
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Which of the following bases are pyrimidines? Choose all that
apply.
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