----------1-Lipophilic hormones (steroids) generate the synthesis of new protein

Question

----------1-Lipophilic hormones (steroids) generate the synthesis of new proteins by   a) binding to the hormone response element (HRE) on the DNA which “turns on” a specific gene b) activate a protein kinase that phosphorylates (activates) a key enzyme    c) stimulates the conversion of ATP into the second messenger cAMP   d) activates the two second messengers IP3 and DAG that are responsible for the hormonal response   e) none of the above.

_____ 2.    By definition circadian rhythms are    a) hourly   b) approximately 24 hr   c) regulated by the lunar cycle (28 days) d) dependent on the rotation around the sun (365 days).

Explanation / Answer

Steroid hormones generate the synthesis of new protein by binding to hormone receptor elements on DNA which turn on a specific gene. Circadian rhythms are usually 24 hrs.

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