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Questions and Answers
What is a variable in an experiment?
What is a variable in an experiment?
- An aspect of the experimental conditions that can change (correct)
- A tool used to measure the outcome
- A factor that remains constant
- The outcome of the experiment
What did Hershey and Chase observe about the tagged DNA and protein after the experiment?
What did Hershey and Chase observe about the tagged DNA and protein after the experiment?
- The tagged DNA was not being passed on to the cells while the tagged protein was
- The tagged DNA was being passed on to the cells while the tagged protein was not (correct)
- Neither the tagged DNA nor protein was being passed on to the cells
- Both the tagged DNA and protein were being passed on to the cells
What is the purpose of controlling variables in an experiment?
What is the purpose of controlling variables in an experiment?
- To ensure that only the desired variables change (correct)
- To ensure that all variables change simultaneously
- To eliminate the need for a hypothesis
- To guarantee a specific outcome
What is the significance of Hershey and Chase's experiment?
What is the significance of Hershey and Chase's experiment?
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What should be done after an experiment is completed?
What should be done after an experiment is completed?
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Study Notes
Variables in Experiments
- A variable is an aspect of experimental conditions that can change.
- In Hershey and Chase's experiment, the molecule that was tagged was a variable.
- The location of the tagged molecule was also a variable.
Experimental Design
- Ideally, experiments are designed so that only controlled or observed aspects change.
- However, it's not always possible to control all variables.
Hershey and Chase's Experiment
- The experiment involved tagging molecules to observe how they changed.
- The results showed that tagged DNA was passed on to cells, but tagged protein was not.
Interpretation of Results
- The results supported the hypothesis that DNA provides genetic material.
- Hershey and Chase's experiment was a key piece in understanding how cells pass on genetic information.
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Description
Learn about variables in scientific experiments, including controlled and observed variables, with examples from Hershey and Chase's experiment.
