Multiple Choice
Which of the following statements about cell surface receptors is incorrect?
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21. The Immune System
Cell Communication: Surface Receptors & Adhesion Molecules
Multiple Choice
Which of the following is likely to be a response by a receptor protein to an approaching signal molecule?
A
Recognize the receptor protein having the correct 3-D shape.
B
Receptor protein binds to signal if having complementary shape.
C
Once a signal binds to a receptor protein it induces a change in the receptor protein's shape.
D
Change in the receptor protein's shape results in a cellular response to the signal.
E
All of the above are correct.
Verified step by step guidance1
Understand that receptor proteins are specialized molecules on the cell surface or within cells that recognize and bind to specific signal molecules, often referred to as ligands.
Recognize that the first step in the signaling process is the recognition of the signal molecule by the receptor protein, which requires the receptor to have a specific 3-D shape that matches the signal molecule.
Acknowledge that the binding of the signal molecule to the receptor protein is highly specific, often described as a 'lock and key' mechanism, where the receptor and signal molecule have complementary shapes.
Once the signal molecule binds to the receptor protein, it typically induces a conformational change in the receptor's structure. This change is crucial for the next steps in the signaling pathway.
The conformational change in the receptor protein often triggers a cascade of events inside the cell, leading to a specific cellular response. This is how cells respond to external signals, and all the steps mentioned are part of this process.
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