Bio 12.1 DNA History

What did Erwin Chargaff conclude from his experiments?

• Nitrogen bases are held together by peptide bonds
• A and T, C and G always occur in equal amounts
• Proteins are the carriers of genetic information
• C and G rarely occur in eukaryotic organisms

What was Watson and Crick's main scientific accomplishment?

• Building the first accurate model of DNA
• Isolating strains of pneumonia causing bacteria
• Determining base pairing rules
• Discovering the process of genetic transformation

What does this image show?

• Double helix structure of DNA

• Triple Helix Structure of DNA

• Double helix structure of RNA

• Triple Helix Structure of RNA

From his work with mice and pneumonia-causing bacteria, Frederick Griffith discovered what?

• Replication
• Transcription
• Transformation
• Translation

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Rosalind Franklin's "Photo 51" allowed Watson and Crick to determine the _______ of DNA.

• Shape
• Backbone
• Nitrogen bases
• Hydrogen bonds

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The work of scientists including Griffin, Avery, Hershey & Chase, and Franklin helped us to determine that _______ are responsible for carrying genetic material.

• Amino Acids
• Proteins
• Nucleic Acids
• Carbohydrates

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Who was responsible for the experiment depicted by the image?

• Martha Chase
• Watson and Crick
• Frederick Griffith
• Rosalind Franklin

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Who was responsible for the model shown?

• Oswald Avery
• Watson and Crick
• Erwin Chargaff
• Rosalind Franklin

By using radioactive isotopes, Hershey and Chase were able to conclude that _____ is the carrier of genetic information.

• DNA
• Protein
• Carbohydrate
• Lipid

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The work of Erwin Chargaff allowed Watson and Crick to determine the rules of.......

• protein synthesis
• transcription
• hydrogen bonding
• nitrogen base pairing

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