<span>Catalase catalyzes the decomposition of hydrogen peroxide to water and oxygen. It is a very </span>important<span> enzyme in protecting the </span>cell<span> from oxidative damage by reactive oxygen species. Hope this answers the question. Have a nice day.</span>
        
             
        
        
        
No that is just, no just no. DNA is copied through cell reproduction where a cell splits to create more (growing for multi called organisms and asexual reproduction for single celled organisms) The mitochondria is an organelle that is the "power house" of the cell, the "digestive system".
        
             
        
        
        
<span>A In spring and summer to coincide with the growing season
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Biotechnology can be used to transform bacteria so they are able to make human proteins, such as insulin. It can also be used to create transgenic crops, such as crops that yield more food or resist insect pests. (I copied this off the web so just paraphrase)
        
                    
             
        
        
        
B because you can get cancer badly by smoking people smoke cause of stress the stress makes it worse to smoke