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(a) Hershey and Chase carried their expe...

(a) Hershey and Chase carried their experiment in three steps : infection, blending, centrifugation. Explain each step.
(b) Write the conclusion and interpretation of the result they obtained.

Text Solution

AI Generated Solution

### Step-by-Step Solution **(a) Explanation of the three steps of the Hershey and Chase experiment:** 1. **Infection:** - In this initial step, Hershey and Chase used bacteriophages (viruses that infect bacteria) to infect E. coli bacteria. They labeled the bacteriophages with radioactive isotopes: sulfur-35 (S-35) to label the protein coat and phosphorus-32 (P-32) to label the DNA. When the labeled bacteriophages were introduced to the E. coli, they attached to the bacterial surface and injected their genetic material (DNA) into the bacteria. **Hint:** Remember that the purpose of this step was to determine which part of the bacteriophage (protein or DNA) was responsible for carrying genetic information into the bacteria. ...
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Knowledge Check

  • The good science classroom teaching would be in which A. the learners are free to ask many questions. B. the teacher uses multiple resources C. the learners devise their own experiments under the guidance of the teacher, carryout experiment and record their observations D. learners observe the demonstration by the teacher and write its steps

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