DNA Structure and Replication

Which bacteria killed the mice in Griffith's transformation experiment?

• Live, harmless and heat-killed harmful

• Live, harmless and heat-killed, harmless

• live harmful and heat-killed, harmless

• live harmless and live, harmful

Griffith called the process he observed transformation because

• the mouse had been transformed

• the harmful bacteria had been transformed

• the harmless bacteria had been transformed

• the experiment had been transformed

What did Avery conclude caused transformation?

• DNA was the transforming factor

• A protein was the transforming factor

• A carbohydrate was the transforming factor

• A lipid was the transforming factor

What happened when Griffith injected mice with the harmless, R-strain bacteria alone?

• the bacteria transformed

• the mouse lived

• the mouse died

• the bacteria died

Griffith's experiments advanced the study of genetics by proving that

• there is a chemical that contains genetic information that is passed from one organism to another

• bacteria can make people sick by infecting them with a chemical that contains genetic information

• the bacteria that can make mice sick are the same bacteria that can be grown in culture dishes in a labortory

• genetic information can be passed from parents to their offspring during sexual reproduction

What is inside a bacteriophage?

• protein

• nucleic acid

• lipid

• carbohydrate

What do bacteriophages infect?

• mice

• humans

• viruses

• bacteria

Why did Hershey and Chase label viral DNA with radioactive phosophorus and not radioactive sulfur?

• DNA contains phosphorus and no sulfur

• Proteins contain phosphorus and no sulfur

• DNA contains sulfur and little phosphorous

• Proteins acids contain sulful and little phosphorus

What stores information in a cell?

• proteins

• carbohyrates

• lipids

• DNA

What happens when a piece of DNA is missing?

• Genetic information is stored

• Genetic information is copied

• Genetic information is lost

• Genetic information is transmitted