BIOMOLECULES AND ENZYMES

BIOLOGY

AMINO ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Basicity of
A
Free-COOH
B
Free-NH2
C
Carboxylate ion
D
Ammonium ion
Explanation: 

Detailed explanation-1: -These are aspartic acid or aspartate (Asp) and glutamic acid or glutamate (Glu). Their side chains have carboxylic acid groups whose pKa’s are low enough to lose protons, becoming negatively charged in the process.

Detailed explanation-2: -Some examples of basic amino acids are lysine, arginine.

Detailed explanation-3: -An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid.

Detailed explanation-4: --Amino acids are simple molecules that are made of a central C-atom, labelled Ca, that is bound to a primary amine group NH2 and to a carboxylic group COOH. From: The Hydrogen Bond and the Water Molecule, 2007.

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