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Name ___________________________________ Date ____________ Period ______ Proving that DNA Stores Information Objective: Explain how scientists used evidence to discover that DNA is the molecule that stores information. Definitions: Benign: __________________________________________________________ Virulent:__________________________________________________________ We have studied a few types of molecules. Complete the table to show each type. Type of Molecule Made of Example Enzymes Carbohydrates Sugars Nucleotides EXPERIMENT 1: What makes an organism change form? Scientist name:___________________________________________________ Year:________ Experiment Reason for each Treatment Explain what Griffin’s experiment shows about genetics (use the data to explain your answer): EXPERIMENT 2: Which molecule carries information for the trait? Three different hypotheses are below no protein The information molecule is DNA… The information molecule is RNA… The information molecule is protein… ACTUAL RESULTS no RNA no DNA If true, will this solution transform R cells to S cells? If true, will this solution transform R cells to S cells? If true, will this solution transform R cells to S cells? [YES] / [NO] [YES] / [NO] [YES] / [NO] If true, will this solution transform R cells to S cells? If true, will this solution transform R cells to S cells? If true, will this solution transform R cells to S cells? [YES] / [NO] [YES] / [NO] [YES] / [NO] If true, will this solution transform R cells to S cells? If true, will this solution transform R cells to S cells? If true, will this solution transform R cells to S cells? [YES] / [NO] [YES] / [NO] [YES] / [NO] Did this solution transform R cells to S cells? Did this solution transform R cells to S cells? Did this solution transform R cells to S cells? [YES] / [NO] [YES] / [NO] [YES] / [NO] Conclusions about Experiment 2 (use the data to explain your answer): EXPERIMENT 3: Is the hereditary information composed of DNA or proteins? Two different hypotheses are below DNA is injected by the virus as the information molecule Protein is injected by the virus as the information molecule ACTUAL RESULTS Viruses with radioactive proteins infect bacteria Viruses with radioactive DNA infect bacteria Where will the radioactivity be found? Where will the radioactivity be found? [inside] or [outside] the cells [inside] or [outside] the cells Where will the radioactivity be found? Where will the radioactivity be found? [inside] or [outside] the cells [inside] or [outside] the cells Radioactivity was found: Radioactivity was found: [inside] or [outside] the cells [inside] or [outside] the cells Conclusions from Experiment 3 (use the data to explain your answer):
