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  4. Hormones that are hydrophobic show delay in initial action and capable of altering gene expression are

Q. Hormones that are hydrophobic show delay in initial action and capable of altering gene expression are

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Solution:

Based on their chemical nature, hormones can be divided into the following groups:
(i) Peptide, polypeptide, protein hormones: E.g., insulin, glucagon, pituitary hormones, hypothalamic hormones, etc.
(ii) Steroids: E.g., cortisol, testosterone, estradiol, aldosterone and progesterone.
(iii) Iodothyronines (thyroid hormones)
(iv) Amino-acid derivatives: E.g., epinephrine (adrenaline), nor-epinephrine (nor-adrenaline).
Steroid hormones and iodothyronine are hydrophobic hormones that interact with intracellular receptors and mostly regulate gene expression or chromosome function by the interaction of the hormone-receptor complex (HRC) with the genome.