Discovery of DNA and its Structure

What is the role of DNA in heredity?

• DNA is responsible for energy production in cells.

• DNA carries the genetic information passed from parents to offspring.

• DNA is involved in the digestion of nutrients.

• DNA helps in the synthesis of lipids.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In what year did Griffith conduct his experiment on bacterial transformation?

• 1928

• 1932

• 1945

• 1950

What was Griffith trying to develop when he conducted his experiment?

• A vaccine for influenza

• A vaccine for pneumonia

• A cure for cancer

• A treatment for diabetes

What did Griffith discover during his experiment?

• A new type of bacteria

• A transforming principle

• A cure for pneumonia

• A method to prevent bacterial growth

What was the outcome when mice were injected with the live R-strain in Griffith's experiment?

• Mice lived

• Mice died

• Mice became sick but survived

• Mice showed no reaction

What was isolated from the blood of mice injected with the combination of heat-killed S-strain and live R-strain?

• Live R-strain

• Live S-strain

• Dead S-strain

• Dead R-strain

What was the main goal of the Avery-Macleod-McCarty experiment?

• To discover the structure of DNA

• To determine the molecule responsible for Griffith’s transforming principle

• To find a cure for bacterial infections

• To develop a new type of enzyme

Tags

NGSS.HS-LS3-2

Which biological molecule was identified as the transforming factor in the Avery-Macleod-McCarty experiment?

• RNA

• Protein

• DNA

• Lipid

What was the effect of destroying polysaccharides in the Avery-MacLeod-McCarty experiment?

• Mouse dies.

• Mouse lives.

• No effect.

• S strain is not recovered.

What type of virus did Hershey and Chase use in their experiment?

• Retrovirus

• Bacteriophage

• Adenovirus

• Influenza virus