This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanisms of Enzyme Action, Subject name: Biochemistry
Thiamine dependent enzyme- 
Select and explain. 
A. Transketolase, B. Transaldolase, C. Amino transferase, D. Einolase
A: Transketolase
Answer: A: Transketolase 
Explanation: Ans. is 'a' i.e., Transketalase o Active form (coenzyme form) of thiamine is thiamine pyrophosphate (TPP), also called thiamine diphosphate (TDP).o TPP acts as coenzyme for-i) Oxidative decarboxylation Pyruvate dehydrogenase, a-ketoglutarate dehydrogenase, brached-chain keto acid dehydrogenase.ii) Transketolase in PPPo Thiamine deficiency causes beriberi.