Bacteria must absorb molecules from the surrounding environment. Many macromolecules such as starch, proteins and lipids are too large to pass through the cell wall and membrane and, therefore, cannot be used directly as nutritional sources because the molecules. Many bacteria solve this problem by secreting “extracellular” enzymes called to the outside of the cell that degrade macromolecules into smaller compounds that can be taken up by the cells and further metabolized by “intracellular” enzymes. Examples of extracellular enzymes are amylase which degrades starch, protease for proteins, lipase for lipids, and DNase, which degrades DNA.
Bacteria must absorb molecules from the surrounding environment. Many macromolecules such as starch, proteins and lipids are too large to pass through the cell wall and membrane and, therefore, cannot be used directly as nutritional sources because the molecules. Many bacteria solve this problem by secreting “extracellular” enzymes called to the outside of the cell that degrade macromolecules into smaller compounds that can be taken up by the cells and further metabolized by “intracellular” enzymes. Examples of extracellular enzymes are amylase which degrades starch, protease for proteins, lipase for lipids, and DNase, which degrades DNA.
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