Unit 3: DNA Structure and History

Who was responsible for determining the base pairing of DNA?

• Watson 
• Crick
• Chargaff
• Wilkins

What are the base pairings in DNA?

• A-T and C-G
• A-C and G-T
• C-T and G-A
• T-T and C-G and C-A

What sugar molecule is in the nucleic acid DNA?

• ribose
• glucose
• deoxyribose
• sucrose

What two molecules make up the 'backbone' of DNA?

• Adenine and thymine
• Phosphate and sugar
• Cytosine and guanine
• phosphate and guanine

What are the three parts that make up a DNA nucleotide?

• phosphate, sugar, and nitogen containing base
• sugar, phosphate and adenine
• adenine, guanine and sugar
• nitrogen, sugar, phosphate

What was the final piece of the puzzle that Watson needed help with to determine in order to find the structure of DNA?

• how that backbone fit together
• the number of strands
• whether it was a helix
• how the base pairs bonded 

Who showed Watson the 'photo 51' that Franklin had taken of the B-form of DNA?

• Raymond Gosling
• Maurice Wilkins
• Frances Crick
• Lawence Bragg

Who did Watson and Crick credit in their published structure of DNA?

• Themselves
• Themselves and Wilkins and Franklin
• Themselves, Chargaff, Wilkins, and Franklin
• Themselves, Wilkins, Franklin and Pauling

Who won Nobel prizes for the discovery of the structure of DNA?

• Watson, and Crick
• Watson, Crick, Wilkins
• Watson, Crick, Wilkins, Franklin
• Watson, Crick, Wilkins, Franklin, and Gosling

What type of bond holds the complementary bases of DNA together?

• ionic bonds
• electrostatic bonds
• hydrogen bonds
• molecule shape