<p>you are given four test tubes containing purified biological macromolecules.

Question

<p>you are given four test tubes containing purified biological macromolecules. the test tubes are unlabeled except for a number between 1 and 4. you are told that one test tube contains a protein, one contains a lipid, one contains a carbohydrate, and one contains a nucleic acid. you then perform some tests on the macromolecules and collect the following information:</p>
<p>a.) test tubes #2 and #4 contain nitrogen, but the other tubes do not.</p>
<p>b.) the contents of test tube #3 are not soluble in water, but the contents of the other test tubes are soluble in water.</p>
<p>c.) the contents of test tube #1 can be broken down into subunits that are all exactly identical to each other.</p>
<p>d.) the macromolecule in test tube #2 is found to have a globular shape.</p>
<p>WHAT ARE THE IDENTITIES OF THE MACROMOLECULES PRESENT IN TEH TEST TUBES #1, #2, #3?</p>
<p>TEST TUBE #1______________&#160;&#160; TEST TUBE #2_________________ TEST TUBE #3____________</p>

Explanation / Answer

Test tube 3 = lipid because lipids are not soluble in water Test tube 2 = protein, when complex enough they take on a globular formation after folding test tube 1 = carbohydrate, these can be complex molecules with repeating subunits, and they do not contain nitrogen

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