(C) tetrapeptide is formed by the linkage of $4$ amino acids.In a linear polypeptide chain,the number of peptide bonds is always $(n - 1)$,where $n$ i

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(C) tetrapeptide is formed by the linkage of $4$ amino acids.In a linear polypeptide chain,the number of peptide bonds is always $(n - 1)$,where $n$ is the number of amino acids.For a tetrapeptide,$n = 4$.Number of peptide bonds $= 4 - 1 = 3$.Therefore,(number of amino acids) - (number of peptide bonds) $= 4 - 3 = 1$.

Class 12 Chemistry Biomolecules Amino Acids and Proteins

Medium

In a linear tetrapeptide (constituted with different amino acids),the value of (number of amino acids) - (number of peptide bonds) is:

JEE MAIN 2022 All JEE MAIN

A
$3$
B
$2$
C
$1$
D
$0$

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Class 12

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Biomolecules

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Amino Acids and Proteins

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Nitrogen is an essential constituent of all

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The substituents $R_1$ and $R_2$ for nine peptides are listed in the table given below. How many of these peptides are positively charged at $pH = 7.0$?
Peptide $R_1$ $R_2$
$I$ $H$ $H$
$II$ $H$ $CH_3$
$III$ $CH_2COOH$ $H$
$IV$ $CH_2CONH_2$ $(CH_2)_4NH_2$
$V$ $CH_2CONH_2$ $CH_2CONH_2$
$VI$ $(CH_2)_4NH_2$ $(CH_2)_4NH_2$
$VII$ $CH_2COOH$ $CH_2CONH_2$
$VIII$ $CH_2OH$ $(CH_2)_4NH_2$
$IX$ $(CH_2)_4NH_2$ $CH_3$

Peptide	$R_1$	$R_2$
$I$	$H$	$H$
$II$	$H$	$CH_3$
$III$	$CH_2COOH$	$H$
$IV$	$CH_2CONH_2$	$(CH_2)_4NH_2$
$V$	$CH_2CONH_2$	$CH_2CONH_2$
$VI$	$(CH_2)_4NH_2$	$(CH_2)_4NH_2$
$VII$	$CH_2COOH$	$CH_2CONH_2$
$VIII$	$CH_2OH$	$(CH_2)_4NH_2$
$IX$	$(CH_2)_4NH_2$	$CH_3$