Question
With help of the drug shown below, serotonin is synthesized from which of the following precursor amino acid?

| A. |
Tyrosine. |
| B. |
Tryptophan. |
| C. |
Phenylalanine. |
| D. |
Glycine. |
Show Answer

| A. |
Tyrosine. |
| B. |
Tryptophan. |
| C. |
Phenylalanine. |
| D. |
Glycine. |