Exploring Griffith's Experiment and Bacterial Transformation

What was Frederick Griffith attempting to find when he conducted his famous experiments?

• A vaccine for pneumonia

• A cure for tuberculosis

• A remedy for the common cold

• A treatment for influenza

Which strain of Streptococcus pneumoniae has a smooth polysaccharide coat?

• R strain

• S strain

• T strain

• Q strain

What did Griffith observe about the non-virulent R strain?

• It became resistant to antibiotics

• It always remained non-virulent

• It changed color

• It sometimes reverted to the virulent S strain

Which group of mice was injected with a combination of heat-killed S strain and live R strain?

• Group 2

• Group 1

• Group 3

• Group 4

What was the outcome for the mice injected with the heat-killed S strain alone?

• They survived

• They developed pneumonia and died

• They became immune to the S strain

• They showed no reaction

What did Griffith call the mysterious component that transformed the R strain into the S strain?

• Genetic factor

• Transforming principle

• Virulence factor

• Mutation agent

Who confirmed that nucleic acids are the molecules of heredity?

• Watson and Crick

• Mendel

• Avery, Macleod, and McCarty

• Darwin

What was unknown to Griffith at the time of his experiment?

• The exact nature of the transforming principle

• The existence of bacteria

• The role of proteins in cells

• The concept of heredity

Tags

CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

CCSS.RI.9-10.5

What did Griffith's work prove about organisms?

• They cannot acquire new properties

• They can acquire new properties from their environment

• They are immune to genetic changes

• They only inherit traits from their parents

What is a significant impact of Griffith's work?

• It proved that proteins are the molecules of heredity

• It showed that non-heritable exchange of genetic information is possible

• It confirmed that all genetic information is inherited

• It demonstrated that bacteria cannot change their properties