Functional groups attached to a carbon-hydrogen core provide characteristic chemical properties. Which of the following statements about functional groups is INCORRECT?
A) A carboxyl group may lose an electron and provide a negative charge to the group.
B) A phosphate group in water readily loses a proton to form an unstable ion.
C) A hydroxyl group (-OH) is polar and readily forms hydrogen bonds.
D) A thiol group (-SH) does not form hydrogen bonds.
E) An amino group in water readily accepts a H+ ion to become positively charged.
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