History and Structure of DNA

Rosanlind Franklin's x-ray diffraction image of her study of DNA was noticed by Watson and Crick and led them to model what they thought the shape and structure of DNA was. What was that shape?

• the double helix

• the single strand

• the sugar and phosphate

• the four nitrogen bases

Which of the following best describes a DNA molecule?

• double helix

• contains ribose

• made of amino acids

• contains Uracil

Tags

NGSS.HS-LS1-1

By using radioactive isotopes, Hershey and Chase were able to conclude that _____ is the carrier of genetic information.

• DNA

• Protein

• Carbohydrate

• Lipid

Tags

NGSS.HS-LS1-1

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases

• the order (sequence) of the nitrogen bases

• the color of the nitrogen bases

• the frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1

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

• protein synthesis

• transcription

• hydrogen bonding

• nitrogen base pairing

Tags

NGSS.HS-LS1-1

Who developed the double-helix model of DNA?

• Watson & Crick

• Avery

• Hershey & Chase

• Franklin

What is the primary structural feature of DNA that allows it to store genetic information?

• Double helix

• Single strand

• Triple helix

• Quadruple helix

Which scientist's work with X-ray diffraction was crucial in identifying the structure of DNA?

• Rosalind Franklin

• James Watson

• Francis Crick

• Maurice Wilkins

What are the components of a nucleotide in DNA?

• Sugar, phosphate, nitrogenous base

• Sugar, lipid, nitrogenous base

• Phosphate, lipid, nitrogenous base

• Sugar, phosphate, amino acid

In what year was the double helix structure of DNA discovered?

• 1953

• 1944

• 1962

• 1970