Cell cycle
An ordered sequence of events in the life of a dividing eukaryotic cell, composed of the M,
G 1 , S, and G 2 phases.
Cell-cycle control system
A cyclically operating set of proteins that triggers and coordinates events in the eukaryotic
cell cycle.
Cell division
The process in reproduction and growth by which a cell divides to form daughter cells.
Cell fractionation
The disruption of a cell and separation of its organelles by centrifugation.
Cell inclusions
The act of including or the state of being included.
Cell-mediated immunity
The type of immunity that functions in defense against fungi, protists, bacteria, and viruses
inside host cells and against tissue transplants, with highly specialized cells that circulate in
the blood and lymphoid tissue.
Cell membrane
The outer membrane of the cell; the plasma membrane.
Cell organelles
A specialized part of a cell; “the first organelle to be identified was the nucleus”.
Cell plate
A double membrane across the midline of a dividing plant cell, between which the new cell
wall forms during cytokinesis.
Cell theory
All living things are composed of cells; cells arise only from other cells. No exception has
been found to these two principles since they were first proposed well over a century ago.
Cellular
Consisting of or containing a cell or cells
Cellular level
Process that occurs in cellular
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