Biology II Ch. 14 Testing Yourself in Text
Matching
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a. | Griffith | c. | Meselson and Stahl | b. | Chargaff | d. | Hershey and
Chase |
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1.
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A = T and G = C
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2.
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Only the DNA from T2 enters the bacteria.
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3.
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R strain bacteria became an S strain through transformation.
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4.
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DNA replication is semiconservative.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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5.
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If 30% of an organism’s DNA is thymine, then
a. | 70% is purine | c. | 30% is adenine | b. | 20% is guanine | d. | both B and C are
correct |
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6.
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If you grew bacteria in heavy nitrogen and then switched them to light nitrogen,
how many generations after switching would you have some light/light DNA?
a. | never, because replication is semiconservative | b. | the first
generation | c. | the second generation | d. | only the third
generation |
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7.
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The double-helix model of DNA resembles a twisted ladder in which the rungs of
the ladder are
a. | a purine paired with a pyramidine | b. | A paired with G and C paired with
T | c. | sugar-phosphate paired with a sugar-phosphate | d. | both A and B are
correct |
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8.
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Cell division requires that the genetic material be able to
a. | store information | c. | undergo rare mutations | b. | be
replicated | d. | all of these are
correct |
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9.
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In a DNA molecule, the
a. | bases are covalently bonded to the sugars | b. | sugars are
covalently bonded to the phosphates | c. | bases are hydrogen-bonded to one
another | d. | all of these are correct |
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Completion 10-15
go with Understanding the Terms on page 234
Complete each statement.
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10.
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A. Alteration in DNA composition and also an alteration in chromosome
structure and number.
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11.
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B. Bonding between particular purines and pyrimidines in DNA.
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12.
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C. During replication, an enzyme that joins the nucleotides complementary
to a DNA template.
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13.
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D. Type of nitrogen-containing base, such as adenine and guanine, having
a double-ring structure.
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14.
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E. Virus that infects bacteria.
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15.
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F. One of four nitrogen-containing bases in nucleotides composing the
structure of DNA that is complementary to adenine.
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