instruction:
In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
question:
Question: Which amino acid serves as a starting point for the synthesis of porphyrins (heme group)? 
 Options:  <1> Valina <2> To the girl. <3> Asparagine <4> Lysine <5> Glycine
answer:
5


question:
Question: What amino acids can be bound to a sugar by an O-glycosidic bond? 
 Options:  <1> Ser and Thr. <2> Cys and Ser. <3> Asn and Thr. <4> Lys and His. <5> Val and Leu.
answer:
1


question:
Question: The pyruvate carboxylase activity depends on the positive allosteric effector: 
 Options:  <1> Succinate <2> AMP. <3> Isocitrate. <4> Citrate. <5> Acetyl CoA
answer:

5