Lipid-Soluble Signalling Molecules, Such as Testosterone, Cross the Membranes of All

question 65

Multiple Choice

Lipid-soluble signalling 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)most cells lack the Y chromosome required.
• D)only target cells possess the cytosolic enzymes that transduce the testosterone.
• E)only in target cells is testosterone able to initiate the phosphorylation cascade leading to activated transcription factor.

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