Cells Flashcards
The three postulates of the cell theory
All organisms are composed of one or more cells
The cell is the basic unit of structure and organization in living organisms
All cells come from pre-existing cells
Invented the first compound microscope
Zacharias Jansen
Discovered animalcules from dental scrapings, which were in fact bacteria and other microorganisms
Anton Van Leeuwenhoek
Coined the term ‘cell’; observed cork cells
Robert Hooke
Proposed one of the first two statements of the cell theory: all plants are made up of cells; free cell formation
Matthias Schleiden
Proposed one of the first two statements of the cell theory: all animals are made up of cells
Theodor Schwann
Contributed the last postulate of the cell theory
Rudolf Virchow
Smallest unit of a living organism; basic building block of all living organisms
Cell
Amoeba, paramecium and euglena are examples of _____ organisms
Unicellular
Animals and plants are examples of _______ organisms
Multicellular
Unicellular organisms that lack a membrane-bound nucleus, but instead, has a false nucleus called a nucleoid, and is the simplest type of cell. It also contains circular DNA (ex. Bacteria)
Prokaryotes
Multicellular (or sometimes unicellular) organisms with cells that contain membrane-bound nucleus, or a true nucleus and organelles with membranes. It can produce a/sexually and it contains linear DNA (ex. Protists, fungi, plants, animals)
Eukaryotes
All cells share these 4 basic parts
Plasma membrane, cytoplasm, DNA and ribosomes
The thin, semi-permeable part of the cell made up of proteins and phospholipids
Plasma membrane
2 layers of phospholipid shaped with a head and tail region
Biphospholipid layer
