Lipid-soluble signaling molecules, such as testosterone, cross the membranes of all cells but affect only target cells because _____

A) only target cells retain the appropriate DNA segments
B) intracellular receptors are present only in target cells
C) only target cells possess the cytosolic enzymes that transduce the testosterone
D) only in target cells is testosterone able to initiate the phosphorylation cascade leading to activated transcription factor


B

Biology & Microbiology

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