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Hormones thyroxine, adrenaline and the p...

Hormones thyroxine, adrenaline and the pigment melanin are formed from

A

tryptophan

B

glycine

C

tyrosine

D

proline

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question about which amino acid is the precursor for the hormones thyroxine, adrenaline, and the pigment melanin, we can break it down into the following steps: ### Step 1: Identify the hormones and pigment - The question mentions three substances: thyroxine, adrenaline, and melanin. - Thyroxine is a hormone produced by the thyroid gland, adrenaline is a hormone secreted by the adrenal medulla, and melanin is a pigment found in melanocytes. ### Step 2: Determine the precursors for each - **Thyroxine**: This hormone has two forms, T3 (triiodothyronine) and T4 (tetraiodothyronine). The precursor for thyroxine is the amino acid **tyrosine**, along with iodine. - **Adrenaline**: This hormone is known as the emergency hormone and is also derived from the amino acid **tyrosine**. It plays a crucial role in the body's response to stress. - **Melanin**: This pigment is responsible for coloration in the skin, hair, and eyes. Melanin is also synthesized from the amino acid **tyrosine**. ### Step 3: Conclusion - All three substances (thyroxine, adrenaline, and melanin) are formed from the amino acid **tyrosine**. ### Final Answer The hormones thyroxine, adrenaline, and the pigment melanin are all formed from the amino acid **tyrosine**. ---
To answer the question about which amino acid is the precursor for the hormones thyroxine, adrenaline, and the pigment melanin, we can break it down into the following steps: ### Step 1: Identify the hormones and pigment - The question mentions three substances: thyroxine, adrenaline, and melanin. - Thyroxine is a hormone produced by the thyroid gland, adrenaline is a hormone secreted by the adrenal medulla, and melanin is a pigment found in melanocytes. ### Step 2: Determine the precursors for each - **Thyroxine**: This hormone has two forms, T3 (triiodothyronine) and T4 (tetraiodothyronine). The precursor for thyroxine is the amino acid **tyrosine**, along with iodine. ...
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