History of DNA Structure

Who is responsible for producing this image?

• Francis Crick
• James Watson
• Rosalind Franklin
• Watson and Crick

Which sugar is contained in DNA

• Dextrose
• Ribose
• Deoxyribose
• Glucose

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Watson and Crick were the first to suggest that DNA is _____

• a short molecule
• the shape of a double helix
• a protein molecule
• the genetic material

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

What are the chemical components of DNA?

• A phosphate, nitrogenous base, and an amino acid
• A nitrogenous base, a sugar, and an amino acid
• A phosphate, a sugar, and a nitrogenous base
• A nitrogenous base, sugar, and a helix

Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

On a scale from 1-4 with 4 being the most comfortable, how comfortable are you with this material?

• 1
• 2
• 3
• 4

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