Homework Help: AP BIO

Posted by bubba on Wednesday, October 7, 2009 at 5:43pm.

a student wished to test a sample of organic material to determine whether it was sugar, a dat, or starch. If she could perform only one of the following, which would be the most revealing?

1- test for the presence of carbon and hydrogen in the sample
2- test the sample to determine the amount of amino acid present
3-burn the sample in a calorimeter
4-determine the kinds of chemical bonds present in the molecules of the sample
5- test for the presence of each substance (sugar, starch, and fat) in living organisms

AP BIO - bobpursley, Wednesday, October 7, 2009 at 5:46pm
knowing the kinds of chemical bonds would be most helpful. Sugars, fats, and starches have only covalent bonds.
AP BIO - bubba, Wednesday, October 7, 2009 at 5:53pm
but how would this be revealing if they all have the glycosidic bonds? wouldn't that just be harder to differentiate them?

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