Biology Cell Processes and Structures

Front

Active transport

Back

Energy-requiring process that moves material across a cell membrane against a concentration difference.

Front

Cell

Back

Collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life.

Front

Cell membrane

Back

Thin, flexible barrier around a cell; regulates what enters and leaves the cell.

Front

Cell specialization

Back

Process in which cells develop in different ways to perform different tasks.

Front

Cell theory

Back

Idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells.

Front

Cell wall

Back

Strong supporting layer around the cell membrane in plants, algae, and some bacteria.

Front

Centriole

Back

One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope.

Front

Chloroplast

Back

Organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy.

Front

Chromatin

Back

Granular material visible within the nucleus; consists of DNA tightly coiled around proteins.

Front

Chromosome

Back

Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next.