What is the function of the protein $GLUT-4$?

Identify the type of bond formed between the carboxyl group of one amino acid residue and the amino group of another amino acid residue.

What are horns,nails,and hair made of?

$S$ - Statement: Hemoglobin is a conjugated protein.
$R$ - Reason: Hemoglobin contains globin protein in its structure.

Identify the protein from the given options.

The triple helical structure of collagen was published in Nature in $1954$, and the analysis of the allowed conformations of proteins was performed through the use of the: