A new hormone has been isolated from an organism. Although the structure of the hormone has not yet been determined, the hormone
is known to exert its effects by forming a hormone-receptor complex that acts as a transcription factor within target cells. What type of hormone is this MOST likely to be?
A hydrophobic hormone with an intracellular receptor.
Explanation:
Because of their chemical nature, hydrophobic hormones (like steroid or thyroid hormones) can cross the cell membrane and bind to its intracellular receptor forming a hormone-receptor complex. This complex will then bind a specific segment of the DNA and will act a transcription factor.
