DNA History and Discovery

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

Franklin used x-ray crystallography to determine the shape of the DNA molecule is

• a cloverleaf
• a braided rope
• a pleated sheet
• a twisted ladder

How did Rosalind Franklin's photo 51 affect the work of Watson and Crick? (picture is shown)

• 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

Tags

NGSS.HS-LS1-1

Frederick Griffith named the two types of pneumonia bacteria

• R and S strains
• adenine and guanine
• bad and good strains
• watson and crick

S-strain bacteria

• caused pneumonia
• had a smooth appearance
• was covered by a mucus-like coat
• all of these

Griffith discovered

• that DNA was the genetic material
• that R-strain had transformed into S-strain
• that x-rays can take pictures of DNA
• that mice aren't very good for genetic studies

Oswald Avery discovered

• DNA was the transforming principle
• that there is more phosphorus in DNA than in protein
• how viruses work
• the structure of DNA

The two scientists that confirmed that DNA was what genes are made of by using viruses

• Hershey and Chase
• Watson and Crick
• Franklin and Wilkins
• Chargaff and Griffith

The name given to the shape of DNA is

• double helix
• alpha spiral
• corkscrew ladder
• homologous strands

Who took the definitive picture of DNA using x-rays?

• Rosalind Franklin
• James Watson
• Erwin Chargaff
• Frederick Griffith