History and Structure of DNA

Who took an x-ray picture of DNA and was able to determine that the shape was a 'spiral'?

• Rosalind Franklin

• Erwin Chargaff

• James Watson and Francis Crick

• Johann Miescher

Who is credited for finding the structure of DNA (built a working model of the structure)?

• Rosalind Franklin

• Erwin Chargaff

• James Watson and Francis Crick

• Oswald T. Avery

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Who determined that the amount of A = T and the amount of G = C?

• James Watson

• Rosalind Franklin

• Erwin Chargaff

• Oswald T. Avery

What did Rosalind Franklin contribute to the effort to identify the structure of DNA?

• Models of cardboard and wire showing the shape of DNA

• X-ray diffraction photos of the DNA molecule

• Radioactive evidence that DNA carried the genetic code

• The ratios of the two sets of nucleotide pairs in DNA

The structure labeled C is the ...

• Chromosome

• Double Helix

• Supercoil

• Nucleosome

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The letter A represents the ....

• Chromosome

• Double Helix

• Nucleosome

• Supercoil

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What is structure Y?

• Nitogenous Base

• Sugar

• Phosphate

• Hydrogen Bond

Letter e represents the ________________________, of which both new molecules are an identical copy.

• DNA

• Okazaki Fragment

• Enzyme

• RNA

Who is responsible for producing this image?

• Francis Crick

• James Watson

• Rosalind Franklin

• Watson and Crick

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A _________ is tightly coiled DNA.

• gene

• chromosome

• trait

• mutation

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