Biology Ch. 7 Vocab Test Flashcards
Basic unit of structure and organization of all living organisms
Cell
States that (1) organisms are made of one or more cells; (2) cells are the basic unit of life; and (3) all cells come only from other cells
Cell theory
Flexible, selectively permeable boundary that helps control what enters and leaves the cell
Plasma membrane
Specialized internal cell structure that carries out specific cell functions such as protein synthesis and energy transformation
Organelle
Unicellular organism with membrane-bound nucleus and organelles
Eukaryotic cell
In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
Nucleus
Microscopic, unicellular organism without a nucleus or other membrane-bound organelles
Prokaryotic Cell
Property of the plasma membrane that allows it to control movement of substance into or out of the cell
Selective Permeability
Plasma membranes layers composed at phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside.
Phospholipid bilayer
Protein that moves substances or wastes through the plasma membrane
Transport Protein
A plasma membrane with components constantly in motion sliding past one another or written the lipid bilayer
Fluid Mosaic Model
Semifluid material inside the cell’s plasma membrane
Cytoplasm
Supporting network of protein fibers that provide a framework for the cell within the cytoplasm
Cytoskeleton
Simple cell organelle that helps manufacture proteins
Ribosome
The site of ribosome production within the nucleus of eukaryotic cells
Nucleolus