Unit 1.6 DNA Discovery Quiz

Who proposed the double helix model of DNA?

• Gregor Mendel

• Johann Friedrich Miescher

• James Watson and Francis Crick

• Phoebus Levene

In which year did Johann Friedrich Miescher isolate nuclein from leukocyte nucleus?

• 1919

• 1869

• 1866

• 1928

Who discovered that DNA contained adenine, thymine, cytosine, guanine, deoxyribose and a phosphate group?

• Johann Friedrich Miescher

• Gregor Mendel

• Phoebus Levene

• Frederick Griffith

What did Oswald Avery, Colin MacLeod and Maclyn McCarty show the 'transforming factor' to be?

• DNA

• Proteins

• Lipids

• Carbohydrates

Who carried out experiments to identify the molecule that carries genetic information using the T2 bacteriophage?

• Frederick Griffith

• Phoebus Levene

• Rosalind Franklin

• Alfred Hershey and Martha Chase

What did Alfred Hershey and Martha Chase conclude was injected into the host cell and constituted the genetic material?

• Proteins

• Lipids

• DNA

• Carbohydrates

Who took Photograph 51 of DNA using X-ray diffraction?

• Phoebus Levene

• Johann Friedrich Miescher

• Gregor Mendel

• Rosalind Franklin

What did James Watson and Francis Crick propose DNA to be made up of?

• Single strand

• Double helix

• Triple helix

• Quadruple helix

In which year did James Watson and Francis Crick describe their double helix DNA model?

• 1952

• 1944

• 1953

• 1962

For what did Frederick Griffith conduct a series of experiments with two strains of pneumococci?

• Smallpox vaccine

• Polio vaccine

• Influenza vaccine

• Measles vaccine