This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Enzymes), Subject name: Biochemistry
Selenium dependent enzyme is? 
Select and explain. 
A. Glutathione peroxidase, B. Xanthine oxidase, C. Cytochrome oxidase, D. Carbonic anhydrase
A: Glutathione peroxidase
Answer: A: Glutathione peroxidase 
Explanation: ANSWER: (A) Glutathione peroxidaseREF: Harper 29th Ed Page 118, 201, 204, 664See Table for Cofactors of enzymes in December 2011 (Biochemistry)Repeat Biochemistry 2005. 2003, 2001, 2000The selenium-containing enzyme glutathione peroxidase will also act on reduced glutathione (GSH) and H2O2 to produce oxidized glutathione (GSSG) and H2O; this enzyme can also use other peroxides as substrates.