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14 Cards in this Set
- Front
- Back
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Who was the first person to isolate DNA?
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Meischer
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Who was the bacteriologist that was trying to produce a vaccine against Strep. pneumoniae?
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Griffith
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Which 3 scientists did experiments to determine the chemical nature of the molecule that caused transformation in Griffith's experiment?
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Avery, McLeod, McCarty
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In 1952, _____ and _____ did an experiment that finally led to the acceptance of DNA as the genetic material.
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Chase, Hershey
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Who showed that DNA could be broken down into 4 nitrogenous bases, a 5-carbon sugar, and a phosphate group?
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Levene
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Who proved Levine's hypothesis wrong by showing that the percentages of C and G were always the same and A and T were always the same?
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Chargaff
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What 2 people fired x-rays at a crystallized molecule of DNA and captured the scattering of those rays on X-ray film. It showed DNA to be helical.
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Franklin, Wilkins
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What 2 people hypothesized that DNA was double stranded, and that the only way to keep a consistent radius was if adenine paired with Thymine and cytosine paired with guanine?
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Watson, Crick
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Transfer of genetic material from one organism to another.
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Transformation
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The two pyrimidines in DNA are
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Thymine and cytosine
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The two purines in DNA are
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Guanine and adenine
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A substance prepared from killed or weakened microorganisms that is used in the body to produce immunity is a ?
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Vaccine
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Who's x-ray diffraction picture of DNA suggested a helical structure?
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Franklin
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What does virulent mean?
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Able to cause disease
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