The Double Helix

In the 1950s when Watson and Crick were working on their model of DNA, many scientists did not think that DNA carried the genetic code. What was the other molecule that they thought it could be?

• carbohydrates

• lipids

• proteins

• nucleic acid

What are the chemical components of a DNA nucleotide?

• a phosphate, a sugar, and a nitrogenous base.

• a phosphate, a nitrogenous base, and an amino acid

• a nitrogenous base, a sugar, and an amino acid

• carbon atoms in sugars

What would be the complimentary strand to the nucleotide sequence?

C-T-A-C

• AGCA

• CTAC

• TCGT

• GATG

Who was credited with the discovery of the structure of the DNA molecule?

• Alfred Hershey and Martha Chase

• Rosalind Franklin and Maurice Wilkins

• James Watson and Francis Crick

• Linus Pauling

Who is credited with the crystallography photo that proved the double helix structure of DNA?

• James Watson

• Francis Crick

• Rosalind Franklin

• Linus Pauling

Information in DNA is stored by the

• sequence of the bases

• length of the strand

• shape of the molecule

The discoverers of the structure of DNA were awarded the Nobel prize in what year?

• 1951

• 1962

• 1973

• 1984

Heredity can be explained by

• an arrangement of atoms

• looking at your parents

• watching the birth of a living thing

• aliens

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