<span>The phospholipid bilayer is a thin polar membrane made of two layers of lipid molecules. ... Biological bilayers are usually composed of amphiphilicphospholipids that have a hydrophilic phosphate head and a hydrophobic tail consisting of two fatty acid chains.</span>
Cellular respiration is the term given to the metabolic reactions responsible for the conversion of biochemical energy in nutrients to adenosine triphosphate (ATP) with the generation of waste productions. ATP is required to provide the chemical energy to reactions in the cell that maintain homeostasis.
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