Chapter 11: Problem 26
What is zwitter ion? Why do amino acids form zwitter ions?
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Answer: A zwitter ion, or dipolar ion, is a molecule that has both positive and negative charges, but is overall electrically neutral. Amino acids form zwitter ions due to the presence of both amino group (basic) and carboxylic acid group (acidic) in their structure. In an aqueous solution, the carboxylic acid group can donate a proton (H+) to the amino group, forming a zwitter ion. This formation plays a crucial role in protein structure and function, as well as in various physiological processes such as acting as buffers and participating in hydrogen bonding.
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