5 Questions
What is a variable in an experiment?
An aspect of the experimental conditions that can change
What did Hershey and Chase observe about the tagged DNA and protein after the experiment?
The tagged DNA was being passed on to the cells while the tagged protein was not
What is the purpose of controlling variables in an experiment?
To ensure that only the desired variables change
What is the significance of Hershey and Chase's experiment?
It was one piece that helped solve the puzzle of how cells pass on genetic information
What should be done after an experiment is completed?
Gather the data and interpret the results in the context of the hypothesis
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.
Learn about variables in scientific experiments, including controlled and observed variables, with examples from Hershey and Chase's experiment.
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