Respuesta :
Answer;
-Amino group
Explanation;
-Functional groups are groups of atoms that occur within organic molecules and confer specific chemical properties to those molecules.
-A functional group can participate in specific chemical reactions. Some of the important functional groups in biological molecules include: hydroxyl, methyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl groups. These groups are usually classified as hydrophobic or hydrophilic depending on their charge or polarity.
Answer:
Least polar function group is amino
Explanation:
Polarity of a given functional group depends on the electronegativity difference of the atoms that constitute the functional group.
Sulfhydryl = -SH
Carboxyl = -COOH
Hydroxyl = -OH
Amino = -NH2
Here: Oxygen 'O' is most electronegative, followed by sulfur, 'S' and finally nitrogen 'N'
Therefore an O-H bond will be more polar than, S-H and followed by the N-H bond.
Since the -COOH group has two electronegative 'O' atoms it will be most polar. The decreasing order of polarity would be:
carboxyl > hydroxyl > sulfhydrl > amino
