Biology Ch. 4
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Surface of cell membranes that biologist describe as a "mosaic" because of the phospholipid bilayers with embedded and attached proteins.
What helps stabilize the membrane in an animal cell at warm temperatures and also helps to keep the membrane fluid at lower temperatures?
The steroid cholesterol
What triggers a change in a protein?
The binding of a signaling molecule
What does a signaling molecule do?
It relays the message into the cell, activating molecules to perform specific functions.
What is "signal transduction"?
A message-transfer process
True or False: Some membrane proteins are enzymes.
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