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effect of copper sulphate on catalase

Asked by mohd | Sep 27, 2007 | A Level > Biology > Coursework
mohd asks:

i need to know exactly how different concentrations of copper sulphate affect the activity of catalase in animal and plant cells. like what it does what damage does it cause to the cells and how does that affect plants and animals.i would also like to know a website which shows pictures of what happens and explains in detail .please my course work is due in two days and i need this ASAP.thanks

etutor answers:

Copper behaves as a non-competitive irreversible inhibitor.Copper can combine permanently with sulphydryl (-SH) groups in proteins.This affects the active site of an enzyme. As you add more copper sulphate, there will be more inhibition, until eventually the reaction stops altogether. I know of no website that shows pictures of this, although any picture illustrating non-competitive inhibition will do - they are not usually illustrations of one specific reaction. Try putting "non-competitive inhibition" into Google.

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