Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
3 parts of cell theory
|
Cells are the fundamental units of life
All organisms are composed of cells All cells come from preexisting cells |
|
|
Protobionts
|
Aggregates of abiotically produced molecules that cannot reproduce but do maintain internal chemical environments that differ from their surroundings
|
|
|
The significance of surface area-to-volume ratio.
|
The volume of a cell determines the amount of chemical activity it carries out per unit of time
The surface area of cell determines the amount of substances the cell can take in from the outside environment and the amount of waste products it can release to the environment |
|
|
Basic functions of the plasma membrane
|
Maintains a constant internal environment
Provides a selectively permeable barrier Communicates with adjacent cells and receives extracellular signals |
|
|
Prokaryotic cells
|
Cells that do not have membrane-enclosed organelles
|
|
|
Eukaryotic cells
|
Cells with membrane-enclosed organelles
|
|
|
Domains of prokaryotes
|
Bacteria
Archea |
|
|
Domains of eukaryotes
|
Protists
Plants Fungi Animals |
|
|
2 components of cytoplasm
|
Liquid cytosol with dissolved ions and molecules
Insoluble suspended particles (such as organelles) |
|
|
Features that all prokaryotic cells have in common
|
Plasma membrane
Nucleoid with DNA Cytoplasm Ribosomes |
|
|
Function of cell wall in prokaryotes
|
Gives rigidity and determines its shape
|
|
|
Peptidoglycan
|
Polymer of amino sugars, cross-linked by covalent bonds to form a single molecule that covers the cell.
|
|
|
Capsule in bacteria
|
A layer of slime (made of polysaccharides) that protects them from immune system attacks, dessication, and helps bacteria to attach to other cells.
|
