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It lasts about 90 minutes for a normal person.
Cells need a source of energy, they get this energy by breaking down food molecules to release, the stored chemical energy.
Answer:
Image 1
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Temperature difference and Earth's tilt
1.) Enzymes are a type of protein that speeds up the rate of chemical reactions
2.) Catalase is an enzyme in the liver that hydrogen peroxide (H2O2)
3.) By lowering the activation energy needed
4.) Catalysts