This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following frequently induce bends within α helices? 
Select and explain. 
A. Threonine, B. Tyrosine, C. Glycine, D. Serine
C: Glycine
Answer: C: Glycine 
Explanation: Because it possesses such a small R group, glycine frequently induces bends within α helices.
Ref: Harper’s illustrated biochemistry. 30th edition page no: 38