what were the results of the test c. d. What can you conclude from the results a
ID: 255708 • Letter: W
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what were the results of the test c. d. What can you conclude from the results about the presence or absence of this macromolecule in each substance tested 6. Carbohydrate Lugol's Test a. what is the name of the test substance and what does it test fora b. How do you know from the test that this macromolecule is present? c. What were the results of the test? d. What can you conclude from the results about the presence or absence of this macromolecule in each substance tested? a. What is the name of the test substance and what does it test for? b. How do you know from the test that this macromolecule is present? C. What were the resulits of the test? d. What can you conclude from the results about the presence or absence of this 7. Protein Blurets Test: macromolecule in each substance tested? 8. What was the purpose of testing the water in each of these tests? 9. A student is running a test for simple sugars. She places 5 mL of each substance into different test tubes and adds five drops of Benedict's solution to each tube. None of the tubes change color. Can she safely say there are no simple sugars in any of the substances? Why or Why nota 10. Buiret reagent will turn your skin brownish/purple. Explain why this happens.Explanation / Answer
7.
1. Lugol’s iodine reagent.
it is beneficial to differentiate between starch and glycogen from distinct polysaccharides. starch and glycogen create helical coils. Iodine atoms fit into these helices to create a starch-iodine or glycogen-iodine complex. Starch has fewer branches than glycogen. therefore, the helices of starch are longer than glycogen, hence binding numerous iodine atoms.
2. Lugol's iodine gives a blue-black colour in the presence of starch. Glycogen produces a brown-blue colour when it reacts with Lugol’s reagent. Other polysaccharides and monosaccharides retard no colour change.
3. The result is that the colour generated by a starch-iodine complex is intensely deep than that achieved with a glycogen-iodine complex.
4. If the macromolecule is present in the substance there will be a colour change otherwise no colour change will be observed.
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