Podcast
Questions and Answers
What is the T2 virus?
What is the T2 virus?
- A bacterium
- A component of DNA
- A bacteriophage that infects Escherichia coli (correct)
- A type of protein
How does a phage reproduce?
How does a phage reproduce?
- By transforming into a protein structure
- By injecting its DNA into the bacterial cell (correct)
- By breaking down the bacterial cell's wall
- By attaching to the bacterial cell's outer wall
Why did biologists conduct the Hershey-Chase experiment?
Why did biologists conduct the Hershey-Chase experiment?
- To study the structure of phage proteins
- To investigate the components of a bacterium
- To understand the process of phage reproduction (correct)
- To determine how phages attach to a bacterial cell
What was the composition of the T2 phage in terms of protein and nucleic acid?
What was the composition of the T2 phage in terms of protein and nucleic acid?
How do progeny phages emerge from a cell after infection?
How do progeny phages emerge from a cell after infection?
What role did radioactive isotopes play in the Hershey-Chase experiment?
What role did radioactive isotopes play in the Hershey-Chase experiment?
What did Oswald Avery, Colin MacLeod, and Maclyn McCarty isolate and purify successfully in 1944?
What did Oswald Avery, Colin MacLeod, and Maclyn McCarty isolate and purify successfully in 1944?
Which type of enzymes were ineffective against the transforming substance identified by Avery, MacLeod, and McCarty?
Which type of enzymes were ineffective against the transforming substance identified by Avery, MacLeod, and McCarty?
What did Griffith theorize might be responsible for the transformation of the R-strain bacteria?
What did Griffith theorize might be responsible for the transformation of the R-strain bacteria?
Which type of bacteria had mutated to the virulent S form according to one of Griffith's interpretations?
Which type of bacteria had mutated to the virulent S form according to one of Griffith's interpretations?
Which enzymes had an effect on eliminating the biological activity of the transforming substance?
Which enzymes had an effect on eliminating the biological activity of the transforming substance?
What did Griffith conclude was the reason behind the transformation of R-strain bacteria?
What did Griffith conclude was the reason behind the transformation of R-strain bacteria?
What did Griffith observe when he injected living S-strain bacteria into mice?
What did Griffith observe when he injected living S-strain bacteria into mice?
What was the result when Griffith injected R-strain bacteria into mice?
What was the result when Griffith injected R-strain bacteria into mice?
What was Griffith's expectation when he injected heat-killed S-strain bacteria into mice?
What was Griffith's expectation when he injected heat-killed S-strain bacteria into mice?
What was Griffith's surprising observation when he infected the mice with living type IIR bacteria and heat-killed type IIIS bacteria?
What was Griffith's surprising observation when he infected the mice with living type IIR bacteria and heat-killed type IIIS bacteria?
What was significant about the type IIIS bacteria observed by Griffith in the blood of the infected mice?
What was significant about the type IIIS bacteria observed by Griffith in the blood of the infected mice?
What conclusion did Griffith draw from the fact that the infectivity of the type IIIS bacteria was heritable through several generations?
What conclusion did Griffith draw from the fact that the infectivity of the type IIIS bacteria was heritable through several generations?
