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Exam 3

biology exam

TermDefinition
prokaryotic cells circular DNA in nucleoid region, lack membrane organelles & nucleus
dehydration synthesis builds large molecules from their smaller monomeric components
ATP delivers energy to almost every reaction in a cell that requires energy in every organism
cell theory all organisms consist of cells & come from cells
functions of protein enzymes, structure, movement, & transport
sperm is the only human cell with flagellum
disulfide bridges strongest force that holds proteins in their proper shape
nucleus location of most eukaryotic DNA
found in all cells plasma membrane, ribosomes, cytoplasm & DNA
galileo galilei father of ballistics & optics, improving telescope
disaccharide when a dehydration reaction joins two monosaccharides
chitin exoskeleton of arthropods, provides structural support for cell walls
enzymatic proteins selective acceleration of chemical reactions
defensive proteins protection against diseases
storage proteins storage of amino acids
transport proteins transport of substances
hormonal proteins coordination of an organisms activities
contractile & motor proteins movement
receptor proteins response of cell to chemical stimuli
structural proteins support
hydrophobic interaction weakest
disulfide bridge strongest
A=T C=G
SEM 3D microscopic scans
TEM 2D microscopic scans
cell fractionation separate subcellular components & other subcellular components from one another
Singer & Nicholson 1973 Fluid Mosaic Model
nucleus contains DNA
nuclear pore allows for passage of material, ribosomes, DNA & protein
nucleolus to assemble ribosomes
ribosomes protein synthesis
mitochondria powerhouse of the cell (most of a cells ATP) uses oxygen to generate ATP
plasma membrane boundary between inside & outside of the cell
flagellum movement
cilia movement
microvilli increase surface area
lysosome contains hydrolytic enzymes
golgi apparatus packages material for export
endocytosis brings material into the cell
exocytosis sends material out of the cell
endosymbiont theory eukaryotic cells engulfed a non photosynthetic prokaryotic cell that formed an endosymbiont relationship
selective permeability allowing some substances to cross more easily than others
permeable allows free passage of a substance
impermeable does NOT allow free passage of a substance
Created by: jaileneg
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