Standard 5 Part 12 DNA

Which scientist discovered transformation?

• Frederick Griffith

• Oswald Avery

• Alfred Hershey

• Martha Chase

Which strain of bacteria caused pneumonia in Griffith's experiments?

• S-strain

• R-strain

• T-strain

• B-strain

Which strain of bacteria was harmless in Griffith's experiments?

• S-strain

• R-strain

• T-strain

• B-strain

When the mixture of heat-killed S-strain and R-strain bacteria was injected into the mice, what happened?

• The mice died

• The mice remained healthy

• The mice changed colors

• The mice got mean

Who determined that DNA was the transforming factor in Griffith's experiments?

• Frederick Griffith

• Rosalind Franklin

• Alfred Chase

• Oswald Avery

What is a virus?

• A tiny, living particle that can infect living cells

• A large, living particle that can infect living cells

• A tiny, nonliving particle that can infect living cells

• A large, nonliving particle that can infect living cells

What is the type of virus that infects bacteria?

• Invader virus

• Virobacteria

• Bacteriovirus

• Bacteriophage

What part of the virus enters inside the bacteria?

• Carbohydrates

• Lipids

• Proteins

• DNA

What is the function of bacteriophage genes?

• Produce more proteins

• Produce new bacteriophages

• Produce more healthy bacteria

• Cause pneumonia

Which scientists concluded that the genetic material inside of the bacteriophage was DNA and not protein.

• James Watson and Francis Crick

• Frederick Griffith and Oswald Avery

• Alfred Hershey and Martha Chase

• Rosalind Franklin and Erwin Chargaff