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Cell | Definition, Types, Functions, Diagram, Division, Theory, Facts . . . What is a cell? A cell is a mass of cytoplasm that is bound externally by a cell membrane Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things Most cells have one or more nuclei and other organelles that carry out a variety of tasks
What is a cell? | Britannica A cell is a mass of cytoplasm that is bound externally by a cell membrane Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things Most cells have one or more nuclei and other organelles that carry out a variety of tasks
Structure and types of cells | Britannica A single cell can be a complete organism in itself, as in bacteria and protozoans Groups of specialized cells are organized into tissues and organs in multicellular organisms such as higher plants and animals There are two distinct types of cells: prokaryotic cells and eukaryotic cells
cell - Kids | Britannica Kids | Homework Help Every organism, or living thing, is made up of structures called cells The cell is the smallest unit with the basic properties of life Some tiny organisms, such as bacteria…
Membrane | Definition, Structure, Functions | Britannica Enclosed by the cell membrane are the cell’s constituents, which include large, water-soluble, highly charged molecules such as proteins, nucleic acids, carbohydrates, and substances involved in cellular metabolism
Prokaryote | Definition, Example, Facts | Britannica The prokaryotic cell membrane is made up of phospholipids and constitutes the cell’s primary osmotic barrier The cytoplasm contains ribosomes, which carry out protein synthesis, and a double-stranded deoxyribonucleic acid (DNA) chromosome, which is usually circular
Cell membrane | Definition, Function, Structure | Britannica Enclosed by the cell membrane are the cell’s constituents, which include large, water-soluble, highly charged molecules such as proteins, nucleic acids, carbohydrates, and substances involved in cellular metabolism
Nucleus | Definition, Function, Structure, Facts | Britannica Within a cell, DNA is organized into dense protein-DNA complexes called chromosomes In eukaryotes, the chromosomes are located in the nucleus, although DNA also is found in mitochondria and chloroplasts