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2 (Alyssa) What question were they trying to answer with the experiment?

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2 (Alyssa) What question were they trying to answer with the experiment?

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The researchers were trying to figure out how much of the protein that is eaten by the rats is made into waste and how much becomes part of the proteins in the rat's body to help understand it with humans. They used amino acids made with isotopes and fed them to the rats to answer this.

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The 3rd step was scientists dicecting animals and investigating the organs and blood for isotopes. Built up means a thing/subjects increases instead of decrease, it builds up overtime getting stronger, to build up they had to add water molecules and proteins.

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(4)what chemical reactions happens with amino acids inside of cells

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(4)what chemical reactions happens with amino acids inside of cells

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amino acids in cells get built together into cells in the body.

2 amino acids take 1 water molecule away and it bonds into a protein in the rat's body. Then it gets used as energy

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1 the scientists believe that living things excrete as much nitrogen as they in take (link)

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1 the scientists believe that living things excrete as much nitrogen as they in take (link)

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the scientists were trying to figure out if animals use the nitrogen they eat. so, they used rats to do an experiment to test that theory.