Which of the following amino acids could result from a single-base substitution in GGA (gly)? Select all that apply. alanine (ala) arginine (arg) aspartic acid (asp) cysteine (cys) glutamic acid (glu) leucine (leu) proline (pro) serine (ser) valine (val) Which of the following amino acids could result from a single-base substitution in GGU (gly)? Select all that apply. alanine (ala) arginine (arg) aspartic acid (asp) cysteine (cys) glutamic acid (glu) leucine (leu) proline (pro) serine (ser) valine (val)