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Cell Structure - Chapter 2
Vocabulary Terms
12
Science
7th Grade
12/15/2011

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Term
Cell membrane
Definition
The semipermeable membrane enclosing the cytoplasm of a cell.
Term
Cytoplasm
Definition
The cell substance between the cell membrane and the nucleus.
Term
Cell wall
Definition
The boundary or wall that is part of the outer structure of certain cells
Term
Organelle
Definition
Structure in the cytoplasm of a eukaryotic cell that can act as a storage site.
Term
Nucleus
Definition
An organelle that controls all the activities of a cell and contains hereditary material made up of proteins and DNA.
Term
Chloroplast
Definition
Green chlorophyll containing plant cell organelle that uses light energy to produce sugar from carbon dioxide and water.
Term
Mitochondria
Definition
A cell organelle that breaks down food and releases energy.
Term
Ribosome
Definition
Small cytoplasmic structure on which cells make their own proteins.
Term
Endoplasmic reticulum
Definition
Cytoplasmic organelle that moves materials around a cell and is made up of a complex series of folded membranes.
Term
Golgi body
Definition
Organelles that package cell materials and transport them within and outside of the cell.
Term
Prokaryotic cell
Definition
Lacks cell membrane bound internal structures.
Term
Eukaryotic cells
Definition
Cells conatin membrane bound internal structures.
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