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Amino Acids

The total num...

Question

The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is___

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Solution

PLAN This problem can be solved by performing hydrolysis of peptide and deciding the nature of product.

Chemical reaction and product formed after hydrolysis of given peptide can be represented as

is glycine which is only naturally occurring amino acid. While (B) (C) and (D) are not naturally occurring amino acids.

Hence, correct integer is (1).

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The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown below is ___

Q. The total number of distinct naturally occurring amino acids obtained by complete acidic hydrolysis of the peptide shown above, is:

Q. A peptide is a short chain of amino acids. The amino acids in a peptide are connected to one another in a sequence by bonds called peptide bonds. Typically, peptides are distinguished from proteins by their shorter length, although the cut-off number of amino acids for defining a peptide and protein can be arbitrary.
Peptides are generally considered to be short chains of two or more amino acids. Meanwhile, proteins are long molecules made up of multiple peptide subunits, and are also known as polypeptides. Proteins can be digested by enzymes (other proteins) into short peptide fragments. Among cells, peptides can perform biological functions. For example, some peptides act as hormones, which are molecules that when released from cells affect other areas of the body.
A decapeptide (Mol. Wt. 796 g/mol) on complete hydrolysis gives glycine (Mol. Wt. 75 g/mol), alanine and phenylalanine. Glycine contribute 47% to the total weight of the hydrolyzed product.The number of glycine units in the decapeptide is:

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(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?

H_{2} N - C | C H_{2} - C O O H H - C O N H - C H_{2} - C_{6} H_{5} | C H - C O O C H_{3}

Q. The number of amino acids and number of peptide bonds in a linear tetrapeptide (made of different amino acids) are respectively :

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