ZoologyA steroid hormone influences the cellular activities by

A steroid hormone influences the cellular activities by

  1. A

    generating a secondary messenger

  2. B

    binding to the membrane-bound receptors

  3. C

    regulating the gene expression

  4. D

    catalyzing biochemical activities

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    Solution:

    Hormones which interact with intracellular receptors (e.g., steroid hormones, iodothyronines, etc.) mostly regulate gene expression or chromosome function by the interaction of hormone-receptor complex with the genome. Cumulative biochemical actions result in physiological and developmental effects.

    Water soluble hormones interact with membrane-bound receptors normally do not enter the target cell, but generate second messengers (e.g., cyclic AMP, IP3Ca++ etc) which in turn regulate cellular metabolism.

    Hormones do to catalyze reactions unlike enzymes.

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