Order of increasing polarity: A. Alanine B. Valine C. Glycine D. Isoleucine: (A) D- B- A-C, (B) B- C- A-D, (C) A- D- C-B, (D) D-A- B-C
Answer is A. All aliphatic amino acids i.e. Glycine, Alanine, Valine, Leucine and Isoleucine are non-polar. Isoleucine is most non polar, followed by valine. Glycine is least non-polar out of all aliphatic amino acids.