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Introduction to Cellular Organelles

Organelles form separate compartments within the cell so various enzymatic reactions can occur in suitable environments. The barriers also prevent reactions within the cell from interfering with other cellular activities. Most organelles are membrane-bound sacs. Depending on the function of the cell, various organelles may be more or less prevalent. However, most animal cells contain all the organelles discussed in this chapter. Figure 10.1 is a schematic representation of a typical eukaryotic cell with the various organelles highlighted.
Although not necessarily considered an organelle, it should be noted that the cell is bounded by a lipid bilayer known as the cell or plasma membrane. It maintains an intricate relationship with organelles, and will be referred to in this chapter. It will be discussed in detail in Chapter 11.

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