Which of the following amino acids contains a | vedclass

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(A) Amino acids are classified based on the nature of their '$R$' group.$1$. Arginine contains a guanidino group in its side chain,which is polar and

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Arginine

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(A) Amino acids are classified based on the nature of their '$R$' group.$1$. Arginine contains a guanidino group in its side chain,which is polar and carries a positive charge at physiological $pH$.$2$. Asparagine has a polar but uncharged '$R$' group (amide group).$3$. Aspartic acid has a polar and negatively charged '$R$' group (carboxyl group).$4$. Alanine has a non-polar,hydrophobic '$R$' group (methyl group).Therefore,Arginine is the correct answer.

Column-$I$	Column-$II$
$A$. Trypsin	$1$. Intercellular ground substance
$B$. $GLUT-4$	$2$. Hormone
$C$. Insulin	$3$. Enzyme
$D$. Collagen	$4$. Enables glucose transport into cells

Which of the following amino acids contains a polar and positively charged '$R$' group?

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Match the following.
Column-$I$ Column-$II$
$A$. Trypsin $1$. Intercellular ground substance
$B$. $GLUT-4$ $2$. Hormone
$C$. Insulin $3$. Enzyme
$D$. Collagen $4$. Enables glucose transport into cells

$A$ quaternary protein consisting of two $\alpha$-chains and two $\beta$-chains is:

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