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6th Grade Cells

Cells and Organelles

TermDefinition
cell The smallest unit that can perform all life processes; cells are covered by a membrane and contain DNA and cytoplasm.
organism A living thing; anything that can carry out life processes independently.
cell membrane A semi-permeable, protective layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment.
cytoplasm The gel-like substance in a cell that is constantly moving and where most activities take place.
organelle One of the small bodies in a cell's cytoplasm that are specialized to perform a specific function.
nucleus In a eukaryotic cell, a membrane-bound organelle that contains the cell's DNA and that is the control center of the cell. It controls all the life processes of the cell.
prokaryotic A single-celled organism that does NOT have a nucleus. Examples are archaea and bacteria.
eukaryotic A cell that contains a nucleus enclosed by a membrane; eukaryotes include protists, animals, plants and fungi.
Created by: tesmer