You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Selenium is present in which enzyme - and explain in detail?
Ans. is 'b' i.e., Glutathione peroxidase * Selenium is a trace element that acts as a cofactor for the following enzymes1. Glutathione peroxidase# Glutathione is an antioxidant which is effective in detoxifying hydrogen peroxideH2O2 + 2GSH -> GS - SG + 2H2O# The hydrogen atoms from GSH get added to hydrogen peroxidase to form water. To start with, the source of two hydrogen atoms is selenol side chain of glutathione peroxidase2. Thioredoxinereductase# It generates reduced thioredoxin, a dithiol that serves as an electron source for peroxidases and also the important reducing enzyme ribonucleotidereductase that makes DNA precursors from RNA precursors3. Deiodinase# All three deiodinases Dl, D2, D3 need selenium as a cofactor. These deiodinases help in the conversion ofT4 to T3 or rT3.