Proteins are considered negative ions.

Name: Proteins are considered negative ions.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Proteins are amphoteric, meaning they can act as both acids and bases. At physiological pH, proteins have a net negative charge because the carboxyl groups of aspartic acid and glutamic acid are deprotonated, while the amino groups of lysine, arginine, and histidine are protonated.

Proteins Are Considered Negative Ions