IB DNA & RNA Structure #2

What is the primary function of DNA?

• To determine the sequence of amino acids in a protein molecule

• To determine the sequence of saccharide monomers in a polysaccharide molecule

• To determine the sequence of traits in an individual

• To determine the sequence of fatty acids in a glycerol molecule

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Which of the following differences between DNA and RNA is NOT true?

• DNA and RNA have a different sugar in their nucleotides

• RNA is a single-stranded helix

• RNA can be found in the nucleus and cytoplasm of the cell

• DNA is only found in the cell nucleus

• RNA has the following base paring: A-T, C-G

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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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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Who was responsible for the model shown?

• Oswald Avery

• Watson and Crick

• Erwin Chargaff

• Rosalind Franklin

• Maurice Wilkins

RNA and DNA are similar in that....

• they both comprise of the 5 nitrogenous bases: adenine, thymine, cytosine, guanine, and uracil

• they are both double helixes

• they both contain ribose sugar

• they both contain a phosphate group

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

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