Proteins are important architectural and catalytic components within the cell, helping to determine its chemistry, its shape, and its ability to respond to changes in the environment.Remarkably, all of the different proteins in a cell are made from the same 20 __________.By linking them in different sequences, the cell can make protein molecules with different conformations and surface chemistries, and therefore different functions.

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Proteins are made from 20 different amino acids, which are linked together in different sequences to make different proteins with different functions. Nucleotides make up DNA and RNA, sugars make up carbohydrates, and fatty acids make up lipids.

Proteins Are Important Architectural and Catalytic Components Within the Cell