Question

iodine is required for the synthesis of ________. multiple choice hemoglobin thyroid hormones neurotransmitters vitamin d

Explanation:

To solve this, we analyze each option:

• Hemoglobin synthesis requires iron, not iodine.
• Thyroid hormones (like T3 and T4) need iodine for their production. The thyroid gland uses iodine to make these hormones.
• Neurotransmitters are synthesized from various amino acids, etc., and do not require iodine.
• Vitamin D synthesis involves sunlight and cholesterol - derived precursors, not iodine.

Answer:

B. thyroid hormones