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15. This dipeptide is designated as:0OH3N-CH-CNH-CH-C-oCH2CH2OHSHa. Ser-Lysb. Ser-Cysc. Cys-Serd. Lys-Ser

Question
15. This dipeptide is designated as:
0
O
H3N-CH-CNH-CH-C-o
CH2
CH2
OH
SH
a. Ser-Lys
b. Ser-Cys
c. Cys-Ser
d. Lys-Ser
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15. This dipeptide is designated as: 0 O H3N-CH-CNH-CH-C-o CH2 CH2 OH SH a. Ser-Lys b. Ser-Cys c. Cys-Ser d. Lys-Ser

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Step 1

Amino acids are known to be the building blocks of these proteins. Each amino acid when present in ionized form consists of an α-carbon which has been bonded to ammonium group (NH3+), a hydrogen atom, a carboxylate (-COO-) group and a R group.

Step 2

A peptide bond is a kind of chemical bond that is formed when two consecutive alpha-amino acids one from C1 of one alpha amino acid and other from N2 of other amino acid are linked together to form the protein chain.

Step 3

In the given figure the correct option is (b) as the two amino acids that have been linked together in this dipeptide linkage are serine and cysteine.

The structure of the two acids are as...

HS
он
NH2
This is cysteine
HS-CH, --СH(--NH,)---COОH
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HS он NH2 This is cysteine HS-CH, --СH(--NH,)---COОH

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