SORU: aşağıdaki parçaya göre cevaplayınız
According to the passage, the operation of cells —.
Proteins are of central importance in the chemistry of life. These macromolecules serve as structural components of cells and tissues; growth and repair, as well as maintenance of the organism depend on an adequate supply of these compounds. Many proteins serve as enzymes, molecules that speed up the thousands of different chemical reactions that take place in an organism. The protein constituents of a cell are the clues to its lifestyle. Each cell type has characteristic types, distributions, and amounts of protein that determine what the cell looks like and how it functions. A muscle cell differs from other cell types by virtue of its large content of the proteins myosin and actin, which are largely responsible for its appearance as well as for its ability to contract. The protein haemoglobin, found in red blood cells, is responsible for the specialized function of oxygen transport. Although carbohydrates and lipids tend to have the same structures, among different species, most proteins are species-specific; that is, their structures vary from species to species. The specific proteins present are largely responsib e for differences among species.