Biomolecules and Chemistry in Everyday Life 1 Question 37
39. Aspartame, an artificial sweetener, is a peptide and has the following structure
(i) Identify the four functional groups.
(ii) Write the Zwitter ionic structure.
(iii) Write the structures of the amino acids obtained from the hydrolysis of aspartame.
(iv) Which of the two amino acids is more hydrophobic?
(2001, 5M)
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Solution:
39.
(i) Aspartame has amine, acid, amide and ester groups.
(ii)
(iii) Aspartame $\xrightarrow[\mathrm{H}{2} \mathrm{O}]{\mathrm{H}^{+}} \mathrm{H}$ 青 $\underset{\mathrm{CH}{2} \mathrm{COOH}}{\mathrm{CH}}-\mathrm{COOH}+$
(iv) II is more hydrophobic due to the presence of phenyl group.
