Molecular weight of smallest protein molecule ACTH (adrenocorticotropic hormone) is
A
5600
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B
4500
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C
3100
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D
6200
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Solution
The correct option is B4500 ACTH is secreted by the anterior lobe of the pituitary gland and causes the increased production and release of cortisol by the cortex of adrenal gland. It is a polypeptide hormone which is made up of 39 amino acids and has the molecular weight of 4540 daltons. It stimulates the secretion of glucocorticoid steroid hormones and also lipoprotein uptake by cortical cells.