Which of the following is a molecular disease?

$\alpha$-$helix$ is a secondary structure of proteins formed by twisting of polypeptide chain into right-handed screw-like structures. Which type of interactions are responsible for making the $\alpha$-$helix$ structure stable?

$1.$ Glycylglycine
$2.$ Alanylalanine
$3.$ Glycylalanine
$4.$ Alanylglycine
The dipeptides which may be obtained from the amino acids glycine and alanine are

Which of the following is a conjugated protein?

$A$ peptide synthesized by the reactions of one molecule each of Glycine,Leucine,Aspartic acid and Histidine will have ..... peptide linkages.

Match the $LIST$-$I$ with $LIST$-$II$:

List-$I$ (Amino acid)	List-$II$ (Positive reaction/Test for functional group present in side chain of amino acid)
$A$. Glutamine	$I$. Hinsberg's test
$B$. Lysine	$II$. Neutral $FeCl_3$ test
$C$. Tyrosine	$III$. Ceric ammonium nitrate test
$D$. Serine	$IV$. Hoffman bromamide degradation