Question

chemical structure of hormones
what type of hormone is insulin?
steroid
amino acid derivative
iodothyronine
peptide

Explanation:

Insulin is a peptide hormone. Peptide hormones are composed of amino acids linked together by peptide bonds. Insulin is synthesized as a prohormone and then processed to its active form. It plays a crucial role in regulating blood glucose levels by facilitating the uptake of glucose into cells. Steroid hormones are derived from cholesterol and have a different chemical structure. Amino acid - derivative hormones are derived from single amino acids. Iodothyronine is a type of amino acid - derivative hormone (specifically, thyroid hormones like thyroxine are iodothyronines).

Answer:

Peptide