<span>enzymes are resuable as they are biologically catalyst which speeds up the rate of a reaction without being chemically changed themselves. However, if the enzyme is to be denatured under unfavourable conditions (extreme temperatures, extreme pH), the enzymes may not be reusable once denatured.</span>
Renewable energy: Biofuel, tides, waves, geothermal
Non-renewable energy: Hydrocarbons, gas hydrates
Oxygen is required for cellular respiration, it is an aerobic process. When no oxygen is present, the anaerobic process(a process that doesn't require oxygen) called fermentation begins creating ATP in smaller amounts. In cellular respiration, Oxygen is used to move electrons through the electron transport chain, and remove excess hydrogen and electrons in the form of water,
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<em><u>Production of new vaccines</u></em><em><u>,</u></em><em><u> </u></em><em><u>canc</u></em><em><u>er</u></em><em><u> </u></em><em><u>dr</u></em><em><u>ug</u></em><em><u>s</u></em><em><u> </u></em><em><u>and</u></em><em><u> preparing seedless grapes</u></em> are the benefits of genetic engineering.