`alpha`-amino acids are those, which -

The alpha -amino acids are the building material of

(A) Amino acid that can be synthesised by human body is called essential amino acid. (R) All alpha -amino acids are essential amino acids.

The essential amino acids are those

Carboxylic acids containing an amino group (-NH_(2)) as a substituent are called amino acids. When this amino group substitution is at alpha position with respect to carboxylic group, the aminoacid is called alpha -amino acid. The aminoacids with two carboxylic acids are called acidic amino acids whereas aminoacids with two amino group are called basic amino acids Amino acids show amphoteric character. Ali chiral natural amino acids exist in L-form. : Which of the following is not an alpha -amino acid?

All proteins are made up of alpha -amino acids which act as the building blocks. alpha -amino acids that are synthesised in the body, are known as non-essential alpha -amino acids while the one which the body fails to synthesise, are called essential alpha -amino acids. All of them exist as dipolar ions also known as Zwitterions. For all the alpha -amino acids, there is a certain pH of the medium known as isoelectric point at which the dipolar ions behave as electrically neutral species. In acidic medium, the ion migrates towards cathos while in basic medium, it migrates towards anode on passing electric current. Which of the following is not an essential alpha -amino acid ?