Question

identify the amino acids containing nonpolar, aliphatic R group?A) glycine,alanin, leucine B)lysin,argenin, histidine C)serin,thereonin, cysteine D) phenylalanine, tyrosine, tryptophan ​

Answer 1

C is the correct answer

Answer 2

A) glycine, alanine, leucine contains non polar aliphatic R group.

• Amino acids are characterized by presence of amino group and carboxylic group. The side chain of these amino acids can be polar, non polar, aliphatic or aromatic.
• Glycine has Hydrogen as R group, Alanine has Methyl as R group and leucine has CH2-CH-(CH3)2 as R group.
• Since none of the aliphatic R groups contain electronegative atoms, they are non polar.