The functional group in alcohols is the hydroxyl -OH.
Any lived one
the higher the polarity on a functional group, the more reactive it is. If a functional group is non-polar, it doesn't react with anything without a LOT of energy.For example: a hydrophobic functional group would avoid water at all cost, because it is non-polar, whereas water is polar. Try not to think of this as a "likes repel" sort of thing, but rather that a non-polar functional group is one that has no charge on it, and a polar group has a (+) or (-) charge. While it is true that two (+)'s will repel each other, if there is a (+) functional group, there is likely a (-) one on the other side, which would cause the molecule to flip around and bond that way.Essentially, polarity of a functional group functions as the + or - charge used to bond to the opposite charge of another molecule/functional group.
an amino and a carboxyl group
Polarity occurs when there are un-bonded electrons within the molecule. Without the alcohol functional group, the cholesterol molecule would be non-polar. However, since there is an alcohol functional group, the oxygen's extra electrons cause this molecule to be polar. This alcohol functional group allows the possiblility of linking with other molecules using an ester or hydroxyl bond.
The functional group in alcohols is the hydroxyl -OH.
Any lived one
Alcohol
The hydroxyl -OH.
the higher the polarity on a functional group, the more reactive it is. If a functional group is non-polar, it doesn't react with anything without a LOT of energy.For example: a hydrophobic functional group would avoid water at all cost, because it is non-polar, whereas water is polar. Try not to think of this as a "likes repel" sort of thing, but rather that a non-polar functional group is one that has no charge on it, and a polar group has a (+) or (-) charge. While it is true that two (+)'s will repel each other, if there is a (+) functional group, there is likely a (-) one on the other side, which would cause the molecule to flip around and bond that way.Essentially, polarity of a functional group functions as the + or - charge used to bond to the opposite charge of another molecule/functional group.
H2 non-polar (equal sharing) H20 polar (uneven sharing)
Carboxyl groups are highly polar and can act as weak acids.
The hydroxyl group is polar due to the oxygen, resulting in high solubility in water.
an amino and a carboxyl group
Polarity occurs when there are un-bonded electrons within the molecule. Without the alcohol functional group, the cholesterol molecule would be non-polar. However, since there is an alcohol functional group, the oxygen's extra electrons cause this molecule to be polar. This alcohol functional group allows the possiblility of linking with other molecules using an ester or hydroxyl bond.
The thiol group is on arginine, which is a polar amino acid, but the electronegative difference between sulfur and hydrogen is negligible. To be on the safe side and in conformation with your teacher say it is polar, but put in that electronegativity qualifier.
carbonyl