Genetic Experiments Quiz

What was the primary focus of Griffiths' experiment?

• To prove that proteins are the molecule of inheritance

• To demonstrate bacterial transformation

• To identify the structure of DNA

• To study the effects of radiation on bacteria

Which strain of pneumonia bacteria was lethal in Griffiths' experiment?

• R strain

• Q strain

• S strain

• T strain

What was the groundbreaking discovery in Griffiths' experiment?

• Bacteria cannot change their form

• S strain bacteria are always lethal

• R strain bacteria can become lethal

• Bacteria can be transformed by heat

What was the common belief about the molecule of heredity before Hershey and Chase's experiment?

• It was nucleic acids

• It was carbohydrates

• It was proteins

• It was lipids

What organism did Hershey and Chase use in their experiment?

• Bacteriophages

• Viruses

• Bacteria

• Fungi

What was the purpose of using radioactive sulfur in Hershey and Chase's experiment?

• To label proteins

• To label lipids

• To label nucleic acids

• To label carbohydrates

What did Hershey and Chase conclude about the molecule of inheritance?

• It is lipids

• It is nucleic acids

• It is carbohydrates

• It is proteins

How did Hershey and Chase separate the protein coats from the rest of the bacteriophage components?

• Using a heater

• Using a blender

• Using a spectrometer

• Using a microscope

What was the role of the centrifuge in Hershey and Chase's experiment?

• To mix the samples

• To cool the samples

• To separate components by density

• To heat the samples

What did the radioactive pellet indicate in Hershey and Chase's experiment?

• The presence of proteins

• The presence of nucleic acids

• The presence of carbohydrates

• The presence of lipids