This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
[{'content': 'A small Ca2+ binding protein that modifies the activity of many enzymes and other proteins m response to changes in Ca2+ concentration, is known as \nSelect and explain. \nA. Cycline, B. Calmodulin, C. Collagen, D. Kinesin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Calmodulin is a calcium-binding regulatory protein, with a molecular weight of 17,000 daltonsIt can bind with 4 calcium ionsCalcium binding leads to activation of enzymes. It is a pa of various regulatory kinasesRef: DM Vasudevan, 7th edition, page no: 503, 504', 'role': 'assistant'}]