Final answer:
Peptide hormones can be structured as modified amino acids, proteins, or glycoproteins, but not as steroids or modified nucleic acids. Peptide hormones consist of short chains of amino acids and are a type of protein hormone that is water soluble. Examples include oxytocin, growth hormone, and follicle-stimulating hormone.
Step-by-step explanation:
The possible structures of peptide hormones include:
- Modified amino acids
- Proteins
- Glycoproteins
Peptide hormones are composed of short chains of amino acids. Protein hormones are longer polypeptides and both are synthesized from DNA to mRNA to amino acid chains.
Glycoproteins are peptide hormones with a carbohydrate group attached, enhancing their stability and half-life in circulation. Steroids, which are synthesized from cholesterol, and modified nucleic acids are not considered peptide hormones.