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states that the cell membrane consists of a double layer of phospholipids in association with large protein molecules. Each phospholipid molecule consists of two parts, the 'head' and the 'tail'.
also known as sodium hydrogen carbonate. It is a crystalline white solid that usually appears as...
foods produced from genetically modified organisms.
a mixture of enzymes and other substances secreted by the exocrine cells of the pancreas.
the windpipe or tube that carries air. It is kept open by C-shaped rings of cartilage.