DNA Manipulation and Inheritance Mystery
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Questions and Answers

What did Hershey and Chase's experiment confirm about the genetic material of bacteriophage T2?

  • It consists of a combination of DNA and protein molecules.
  • It consists solely of DNA molecules. (correct)
  • It consists solely of protein molecules.
  • It consists of RNA molecules.

Why did Hershey and Chase use radioactive sulfur in one batch and radioactive phosphorus in another batch during their experiment?

  • To determine if phosphorus is present in phage DNA.
  • To determine if sulfur is present in phage DNA.
  • To determine if sulfur is present in phage protein. (correct)
  • To determine if phosphorus is present in phage protein.

What was the significance of Hershey and Chase's experiment using two contrasting elements, DNA and protein, in bacteriophage T2?

  • It allowed them to study the effects of radiation on DNA.
  • It demonstrated the role of RNA in genetic transfer.
  • It enabled them to conclusively show that DNA is the genetic material. (correct)
  • It helped them determine the structure of protein molecules.

What was the main outcome of Hershey and Chase's experiment with bacteriophage T2?

<p>The confirmation that DNA is the genetic material. (B)</p> Signup and view all the answers

How did Hershey and Chase determine whether phage DNA or protein was transferred to E.coli during infection?

<p>By using radioactive labeling and tracking sulfur and phosphorus. (C)</p> Signup and view all the answers

What did Hershey and Chase's experiment with bacteriophage T2 illustrate about the study of genetics?

<p>The significance of choosing the right model organism for experiments. (D)</p> Signup and view all the answers

What was the leading candidate to be the genetic material before the 1940s?

<p>Proteins (D)</p> Signup and view all the answers

Why did proteins seem to be a stronger candidate as genetic material compared to DNA?

<p>Proteins were made from 20 different amino acids. (A)</p> Signup and view all the answers

How did biologists establish the role of DNA in heredity?

<p>Through experiments with bacteria and viruses (B)</p> Signup and view all the answers

Who was the British medical officer mentioned in the text that contributed to the discovery of the genetic role of DNA?

<p>Frederick Griffith (A)</p> Signup and view all the answers

What was Frederick Griffith trying to develop a vaccine against?

<p>Pneumonia (D)</p> Signup and view all the answers

What happened when Griffith mixed killed pathogenic bacteria remains with living harmless bacteria?

<p>Some living bacteria became pathogenic (C)</p> Signup and view all the answers

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