3: Amino acids

Question 1

Chiral isomers

Answer 1

-all four elemnts bonded to the central carbon are different
-chiralty can arise from secondary structures e.g. α-helix protein

Question 2

Glycine

Answer 2

-simplest amino acid
-diprotic(act as base or acid)
-zwitterion(having a negative and positively charged group)

Question 3

Isolelevtric point: pI

Answer 3

-midway of two pKa values, when molecule net charge=0