$A$ lubricant,mucin in saliva,is made up of:

Which sentence is correct for the structure of $Hb$ (Hemoglobin)?

Which of the following is a heterocyclic amino acid?

What is formed when two identical or different amino acid units are joined together?

Which bond connects Valine and Cysteine?

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