Question

Rearrange the following hormones in Column I to match with their chemical nature in Column II

Column I	Column II
a. Oxytocin	i. Amino acid derivative	( )
b. Epinephrine	ii. Steroid	( )
c. Progesterone	iii. Protein	( )
d. Growth hormone	iv. Peptide	( )

Answer 1

Chemical nature of hormones:

Chemically hormones are of the following types:

• Steroid hormones: Derived from cholesterol.
  Example: Progesterone, testosterone, estradiol, cortisol.
• Peptide/ protein hormones: Derived from proteins.
  Example: Oxytocin, glucagon, insulin, pituitary hormones etc.
• Amino acid hormones: Derived from amino acids like tyrosine. Example- Epinephrine.
• Iodothyronines: Iodinated hormones.
  Example: Thyroid hormones.

Amino acid derivative-Epinephrine:

Epinephrine and norepinephrine are derived from an amino acid known as tyrosine. Hence, they are referred to as amino acid derivative hormones.


Steroid - Progesterone:

Progesterone is a steroid hormone because it is derived from cholesterol.


Protein - Growth hormone:

Numerous protein hormones are secreted by the pituitary gland. Example: Growth hormone, Thyroid-stimulating hormone.


Peptide - Oxytocin:

Considerable hormones secreted by the hypothalamus are peptide hormones.
Example: Antidiuretic hormone [ADH], oxytocin.


Correct match:

Column I	Column II
a. Oxytocin	i. Amino acid derivative	(b)
b. Epinephrine	ii. Steroid	(c)
c. Progesterone	iii. Protein	(d)
d. Growth hormone	iv. Peptide	(a)