Hello,
Please find the detailed solution and explanation of your question below.
ANSWER: Amino acids are building blocks of proteins and amino acid contains caboxyl acids. So the carboxylic acid solubility switch plays a key role in many biological transportation processes. Many kinds of molecular recognition process also takes place with the help of such switch.
Explanation: The explanation is shown in the picture below:

I hope, this answer helps you to better understanding the solubility switch.
Feel free to ask us any doubt regarding the question.
Thank you.
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