which are C-3 epimers. (3 pt.) 6, a) sitting in the sun c) eating plants d) a re

Question

which are C-3 epimers. (3 pt.) 6, a) sitting in the sun c) eating plants d) 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. Circle the one that can be 9. Which of these polymer structures is amylose and which is cellulose? digested by humans. (3 pt. Ho OH OH 10. Indicate whether the asymmetric center is D or L. (2 pt. each) CH,OH CH

Explanation / Answer

6. C

Plants absorb solar energy in the form of light in chlorophyll and convert it into chemical enrgy by photosynthesis:

CO2 + H2O C6H12O6 + O2

We feed on plants directly or indirectly to obtain that energy.

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