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Which one of the following is a peptide hormone :-
A
Glucagon
B
Testosterone
C
Thyroxin
D
Adrenaline
Detailed Solution
Hormones are classified chemically into steroid hormones, peptide (polypeptide or protein) hormones and amine hormones.
Glucagon is a peptide hormone made of 29 amino acids; it is secreted by the $\alpha$-cells of the pancreas and raises the blood glucose level.
Other peptide hormones are insulin and oxytocin.
Testosterone is a steroid hormone.
Thyroxine and adrenaline are amine hormones, derived from the amino acid tyrosine.
So the peptide hormone is glucagon.
Glucagon is a peptide hormone made of 29 amino acids; it is secreted by the $\alpha$-cells of the pancreas and raises the blood glucose level.
Other peptide hormones are insulin and oxytocin.
Testosterone is a steroid hormone.
Thyroxine and adrenaline are amine hormones, derived from the amino acid tyrosine.
So the peptide hormone is glucagon.