DNA and RNA Structure

If 23% of the nitrogenous bases in a DNA molecule are guanine, what percentage of the nitrogenous bases will be adenine?

• 27%

• 23%

• 46%

• 54%

Who is responsible for producing this image?

• Francis Crick

• James Watson

• Rosalind Franklin

• Maurice Wilkins

• Erwin Chargaff

What does this image show?

• Double helical structure of DNA
• Triple Helical Structure of DNA
• Double helical structure of RNA
• Triple Helical Structure of RNA

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NGSS.HS-LS1-1

How did Rosalind Franklin's photo 51 affect the work of Watson and Crick?

• It was used to determine the physical structure of DNA
• It was used to identify the four bases that make up DNA
• It was used to determine the theory of independent assortment
• It was used to show DNA was the molecule of inheritance

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NGSS.HS-LS1-1

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

• protein synthesis

• transcription

• hydrogen bonding

• nitrogenous base pairing

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NGSS.HS-LS1-1

Who was responsible for the model shown?

• Oswald Avery

• Watson and Crick

• Erwin Chargaff

• Rosalind Franklin

• Maurice Wilkins

The two strands of the DNA double helix are held together by what type of bond?

• hydrogen bonds
• peptide bonds
• covalent bonds
• ionic bonds

Which bases are purines?

• A & T
• C & T
• C & G
• A & G

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NGSS.HS-LS1-1

How many rings do pyrimidine bases have?

• 1
• 2
• 3
• 4

Which is the only nucleic acid that this romance could happen within?

• DNA

• RNA