. Lipid-soluble signaling molecules, such as aldosterone,cross the membranes of all cells but affect only target cellsbecause(A) only target cells retain the appropriate DNA segments.(B) intracellular receptors are present only in target cells.(C) only target cells have enzymes that break downaldosterone.(D) only in target cells is aldosterone able to initiate thephosphorylation cascade that turns genes on

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.