Cell Biology Terms

Front

Prokaryotic

Back

A type of cell lacking a true nucleus and membrane-bound organelles, found only in the domains Bacteria and Archaea.

Front

Eukaryotic

Back

A type of cell with a true nucleus and membrane-bound organelles, found in the domain Eukarya.

Front

Cell/Plasma Membrane

Back

A biological membrane that separates and protects the interior of all cells from the outside environment.

Front

Cell Wall

Back

A rigid layer lying outside the plasma membrane of the cells of plants, fungi, and bacteria.

Front

Cytoplasm

Back

The material within a cell, excluding the nucleus, containing organelles and the cytosol.

Front

Organelle

Back

A specialized subunit within a cell that has a specific function.

Front

Nucleus

Back

A membrane-bound organelle in eukaryotic cells that contains the genetic material.

Front

Nucleolus

Back

A small dense spherical structure in the nucleus of a cell during interphase.

Front

Chromatin

Back

The material of which the chromosomes of organisms other than bacteria are composed, consisting of protein, RNA, and DNA.

Front

Nuclear Pore

Back

A protein-lined channel in the nuclear envelope that regulates the transportation of molecules between the nucleus and the cytoplasm.