This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Biochemistry
Bends in alpha helix structure are formed by which amino acid? 
Select and explain. 
A. Glycine, B. Lysine, C. Methionine, D. Glutamine
A: Glycine
Answer: A: Glycine 
Explanation: Amino Acids not Found in Alpha Helix are: Proline: Because of a secondary amino group, it introduces kinkin helix Glycine: Because of small side chain it creates a sharp bend in the structure (Glycine impas flexibility to proteins) Amino acids with bulky R groups: e.g. Tryptophan Charged amino acids like Aspaate, Glutamate Amino acid with branch chain at beta carbon - Valine