Exams › NEET › Biology

The amino acid Tryptophan is the precursor for the synthesis of

1. Melatonin and Serotonin
2. Thyroxine and Triiodothyronine
3. Estrogen and Progesterone
4. Cortisol and Cortisone

Correct answer: Melatonin and Serotonin

Solution

Tryptophan is converted into serotonin, and serotonin is then used to synthesize melatonin. The other options come from different precursors: thyroid hormones from tyrosine, steroid hormones from cholesterol.

Related NEET Biology questions

• Coenzymes NAD and NADP contain the vitamin
• All the reactions in glycolysis are reversible except
• Glycogen is stored in
• The \( 3^{\prime}-5^{\prime} \) phosphodiester linkages inside a polynucleotide chain serve to join
• Which among the following is correctly categorized?
• Tracer elements are

⚔️ Practice NEET Biology free + battle 1v1 →