martes, 28 de octubre de 2008

Eukaryotic cells six grade

section summary

Read the following section summary.
• Eukaryotic cells have organelles that perform functions that help cells remain alive.
• All cells have a cell membrane. Some cells have a cell wall. Some cells have a cytoskeleton.
• The nucleus of a eukaryotic cell contains the cell’s genetic material, DNA.
• Ribosomes are the organelles that make proteins. Ribosomes are not covered by a membrane.
• The endoplasmic reticulum (ER) and the Golgi complex make and process proteins before the proteins are transported to other parts of the cell or out of the cell.
• Mitochondria and chloroplasts are organelles that provide chemical energy for the cell.
• Lysosomes are organelles responsible for digestion within a cell. In plant cells, organelles called vacuoles store cell materials and sometimes act like large lysosomes.

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