Melatonin is a hormone made by the pineal gland. People take melatonin to treat sleep disorders as it is known to function in training the circadian rhythm in humans. Chemically, it is a hydroxylated, decarboxylated, acetylated and methylated tryptophan molecule. To which class of hormones would it belong?

a. lipid-derived
b. peptide
c. amino acid-derived
d. glycoprotein


c. amino acid-derived

Biology & Microbiology

You might also like to view...

The change in Gibbs free energy for a particular reaction is MOST useful in determining

A) the amount of energy catalysts required for biosynthesis or catabolism. B) the potential metabolic reaction rate. C) whether there will be a requirement or production of energy. D) energy stored in each compound.

Biology & Microbiology

Omnivorous animals consume both plant and animal tissue

a. True b. False

Biology & Microbiology

Four of the following are modern apes. Which is not a modern ape?

a. gibbon b. new world monkey c. chimpanzee d. gorilla e. orangutan

Biology & Microbiology

Systemic lupus erythematosus (SLE or lupus) is distinct from other autoimmune disorders because

A. it is also a hypersensitivity disorder. B. it involves an antibody response. C. multiple organs and tissues are affected. D. it may be triggered by an infection. E. there is a genetic predisposition.

Biology & Microbiology