10. Cell Signaling
Classes of Signaling Receptors
Multiple Choice
Multiple ChoiceSteroid hormones can enter a cell by simple diffusion. Therefore, steroids __________.
A
are not an example of signaling molecules
B
do not bind to receptors
C
directly bind to DNA
D
act by phosphorylating DNA
E
do not initiate cell signaling by interacting with a receptor in the plasma membrane
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