NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What happens at physiological pH (7, 4)?
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Most of the carboxyl groups are dissociated and most of the amino groups bind O2
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Most of the carboxyl groups are dissociated
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Most of the carboxyl groups are dissociated create anion NH3-
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Most of the carboxyl groups are dissociated, create anion COO-and most of the amino groups bind H+ creating cation-NH3+
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Explanation:
Detailed explanation-1: -At high pH, both the carboxyl and amine groups are deprotonated. At these pH values, the amino acid carries a net negative charge, and is dibasic.
Detailed explanation-2: -Answer and Explanation: Increasing the pH of a solution may cause the carboxyl group and amino group on an amino acid to deprotonate (i.e., lose a proton or ionize). The carboxyl groups ionize at acidic pH values, such as 2 or 3, while the amino groups will ionize at more alkaline pH values, such as 9 or 10.
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