DCP #4 Review
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Cell Organelles
There are many organelles in a cell.The most important one, the Nucleus, controls all functions in a cell and contain Chromosomes (DNA) that hold all the instructions for the cell and its organelles. The Endoplasmic Reticulum (ER) contains Ribosomes that make proteins. The ER distributes proteins and other materials to and from other organelles. The Mitochondrion provides energy for the cell. Vacuoles store water and extra material. Golgi Bodies, sometimes called Golgi Apparatus or Golgi Complex, package and modifies proteins. Lysosomes recycle waste products within the cell. Cytoplasm holds all the organelles in place. The cell membrane, with its selective permeability, controls what enters and exits the cell. It only lets certain things in and certain things out.Cells also contain enzymes that speed chemical reactions within a cell. Plants Cells Vs. Animal Cells Plant cells and animal cells share many organelles, but there are some that are exclusive to plant cells. A plant cell always contains a Cell Wall that helps it retain its shape. A larger vacuole takes up much space and store mostly water. Plant cells also contain Chloroplasts that use energy from the sun to make food through a process called photosynthesis. Prokaryotic Cells
There are two types of cells: Prokaryotic and Eukaryotic. Eukaryotic cells have Chromosomes (DNA) stored in its nucleus and membrane-bound organelles (ER, Mitochondria, Lysosomes, Golgi Bodies, etc). Prokaryotic cells have no nucleus; their Chromosomes float around in the cell.They also have no membrane-bound organelles. |