a reduction reaction in our brains e) sitting in hot water 7. In the lab it is p

Question

a reduction reaction in our brains e) sitting in hot water 7. In the lab it is possible to (2 pt.) a) link sugars together b) link amino acids together c) link a sugar to a peptide d) link a sugar to a heterocyclic base e) all the above 8. True/ False (2 pt. each) Peptides have to have at least 25 amino acids to be biologically active Disulfide linkages affect how curly your hair is Sugars exist primarily in an open-chain form 9. Which of these polymer structures is amylose and which is cellulose? Circle the one that can be digested by humans. (3 pt.) HO OH d HO OH 10. Indicate whether the asymmetric center is D or L (2 pt. each) CH OH

Explanation / Answer

Q9)since there is alpha 1- 4 glycosidic linkage in first,therefore it is amylose.

As there is beta 1 -4 glycosidic linkage in second therefore it is cellulose.

As cellulose is very stable ,it requires a lot of energy to break down the bonds which is not available in human digestive system,therefore cellulose is NOT digested by humans. While as bonds are comparatively easier to break in case of amylose,so it can be digested by humans.

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