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to speed up cellular processes
to store information for the cell
to speed up cellular processes, structure
Typically proteins are not used for energy in organisms. Enzymes are proteins that speed up the cellular processes in our bodies. Proteins are also needed for the structure and function of body tissues and organs. Proteins do not store genetic information, that is DNA's job.
Considered "the building blocks" of living organisms, proteins direct many of the most basic functions in organisms from the transport of oxygen, to the building of tissues to the replication of DNA. These large molecules are found in all of the cells in the human body.
Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.