BIOLOGY
AMINO ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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basic group, aliphatic group, hydrogen and a R side chain
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acidic group, amino group, hydrogen and a R side chain
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positively charged group, acidic group, hydrogen and an aromatic group
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negatively charged group, basic group, hydrogen and an aliphatic group
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Detailed explanation-1: -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. The term amino acid is short for -amino [alpha-amino] carboxylic acid.
Detailed explanation-2: -Each of the 20 amino acids has a specific side chain, known as an R group, that is also attached to the carbon. The R groups have a variety of shapes, sizes, charges, and reactivities. This allows amino acids to be grouped according to the chemical properties of their side chains.
Detailed explanation-3: -The carbon, carboxyl, and amino groups are common to all amino acids, so the R-group is the only unique feature in each amino acid. (A minor exception to this structure is that of proline, in which the end of the R-group is attached to the -amine.)
Detailed explanation-4: -A basic amino acid has an R group that contains methyl group: carboxyl group thiol group.
Detailed explanation-5: -An R-Group is a side chain attached to the -carbon of all amino acids. It decides the chemical versatility of the amino acid. For example, some R-Groups carry a charge, creating a polar molecule. Some R-groups are hydrophobic or hydrophillic.