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
Insulin receptors are 
Select and explain. 
A. Tyrosine Kinase receptors, B. Phosphodiesterase, C. Calcium calmodulin, D. Lipoprotein
A: Tyrosine Kinase receptors
Answer: A: Tyrosine Kinase receptors 
Explanation: Insulin receptor is a tyrosine kinase which is heterotetrameric glycoproteinRef: Essentials of Medical Pharmacology, 7th edition, KD Tripathi, page no: 261