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Which of the following statements are in...

Which of the following statements are incorrect about receptor proteins ?
a.Majority of receptor protein are embedded in the cell membranes
b.The active site of receptor proteins opens on the inside region of the cell
c.Chemical messengers are received at the binding sites of receptor proteins
d.Shape of receptor doesn't change during attachment of messenger

A

Majority of receptor protein are embedded in the cell membranes

B

The active site of receptor proteins opens on the inside region of the cell

C

Chemical messengers are received at the binding sites of receptor proteins

D

Shape of receptor doesn't change during attachment of messenger

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements about receptor proteins are incorrect, let's analyze each statement step by step: 1. **Statement A**: "Majority of receptor proteins are embedded in the cell membranes." - **Analysis**: This statement is correct. Most receptor proteins are indeed located in the cell membrane, where they can interact with external signals. 2. **Statement B**: "The active site of receptor proteins opens on the inside region of the cell." - **Analysis**: This statement is incorrect. The active site of receptor proteins typically opens on the outside of the cell, allowing them to bind to chemical messengers (ligands) that are present outside the cell. 3. **Statement C**: "Chemical messengers are received at the binding sites of receptor proteins." - **Analysis**: This statement is correct. Receptor proteins have specific binding sites where chemical messengers (such as hormones or neurotransmitters) can attach. 4. **Statement D**: "Shape of receptor doesn't change during attachment of messenger." - **Analysis**: This statement is incorrect. When a messenger binds to a receptor protein, the shape of the receptor often changes (a process known as conformational change), which is crucial for the receptor's function. ### Conclusion: The incorrect statements about receptor proteins are: - **B**: The active site of receptor proteins opens on the inside region of the cell. - **D**: Shape of receptor doesn't change during attachment of messenger. ### Final Answer: The incorrect statements are B and D. ---
To determine which statements about receptor proteins are incorrect, let's analyze each statement step by step: 1. **Statement A**: "Majority of receptor proteins are embedded in the cell membranes." - **Analysis**: This statement is correct. Most receptor proteins are indeed located in the cell membrane, where they can interact with external signals. 2. **Statement B**: "The active site of receptor proteins opens on the inside region of the cell." - **Analysis**: This statement is incorrect. The active site of receptor proteins typically opens on the outside of the cell, allowing them to bind to chemical messengers (ligands) that are present outside the cell. ...
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