This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Membrane Structure & Function, Subject name: Biochemistry
RBC membrane is maintained by:- 
Select and explain. 
A. Spectrin, B. Laminin, C. Collagen, D. Elastin
A: Spectrin
Answer: A: Spectrin 
Explanation: Ans. is 'a' spectrin .Proteins maintaining the shape, flexibility and the strength of RBC membrane are-Spectrin (most important)AnkyrinProtein 4.1A deficiency of any one of the membrane skeletal proteins can cause hereditary spherocytosis* (though spectrin is the most common defect).