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.