Task: Question Answering
Input (English): Question: With respect to the characteristics of the amino acids, indicate which of the following statements is false: 
 Options:  <1> Amino acids are amphoteric substances that can act as acids or bases. <2> The side chains of the amino acids can be apolar, polar without charge or they can be charged at certain pH values. <3> The side chain of the wing can undergo a process of phosphorylation. <4> The proteins are constituted by Lamino Acids. <5> The amino acids Ser, Thr and Tyr can form ester bonds with a phosphate group.
Output (English): 3