Question

Select the peptide hormone(s) from the following options.

• A. Cortisol
• B. Testosterone
• C. Oxytocin
• D. Insulin

Hint:

Steroid hormones come from cholesterol; peptide hormones come from a chain of amino acids.

Answer 1

The Correct Option is C, D

Hormones fall into two broad chemical families: steroid hormones built from cholesterol, and peptide/protein hormones built from chains of amino acids. This question asks you to sort four hormones into the right family.

1. Cortisol: made from cholesterol in the adrenal cortex, it is a steroid hormone, not a peptide.
2. Testosterone: also built from cholesterol, this time in the testes, so it is a steroid hormone too.
3. Oxytocin: a short chain of just nine amino acids released from the posterior pituitary, which makes it a true peptide hormone.
4. Insulin: made of two linked amino acid chains produced by the pancreas, which makes it a protein/peptide hormone.

Cortisol and testosterone are steroids, while oxytocin and insulin are peptides, so the peptide hormones here are options (C) and (D).

Let's summarize:

• Steroid hormones come from cholesterol: cortisol, testosterone.
• Peptide hormones come from amino acid chains: oxytocin, insulin.

So the correct answers are (C) Oxytocin and (D) Insulin.