Which of the following is a steroid hormone?
1. Progesterone
2. Cholesterol
3. ACTH
4. Adrenaline

Which one of the following hormones is a modified amino acid?
1. Progesterone
2. Prostaglandin
3. Estrogen
4. Epinephrine

Chemically hormones are:

1. Proteins, steroids & biogenic amines

2. Proteins only

3. Steroids only

4. Biogenic amines only