The term ________ refers to certain amino acids, which can have both a positive charge and a negative charge.
A) anion
B) cation
C) twinion
D) zwitterion
E) double ion

Question

Quizplus · Accepted Answer

Zwitterion refers to certain amino acids (such as glycine and alanine) that have both a positive and negative charge (i.e. they are dipolar ions). Anions have a negative charge, cations have a positive charge, twinion and double ion are not scientific terms.

The Term ________ Refers to Certain Amino Acids, Which Can