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Bio chaptah 7

Inside The Cell

synthesizes lipids Smooth ER
produces secretory proteins Rough ER
modifies and sorts proteins Golgi Apparatus
Defines cell shape cytoskeleton
Digests proteins Lysosome
Generates ATP Mitochondria
assembles ribosomes nucleus
nucleoid, lysosome, mitochrondria, plasma membrane,nucleolus, flagella, ribosomes--> categorize into pro, euka, and both pro- nucleoid euka- mitochondria, lysosome, nucleolus both- plasma membrane, flagella, ribosomes
In eukaryotic flagella, the fibres that slide past one another due to the activity of dynein proteins are _______________. microtubules
Many cell organelles, most notably the nucleus, are anchored by __________ which are assembled from a diverse class of proteins. Intermediate filaments
Centrosomes are sites where proteins assembles dimers into ______________. microtubules
The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of _____________. microfilaments
The only cytoskeletal fibres not associated with intercellular movement of the whole cell locomotion are the _________________. Intermediate filaments
During muscle contractions myosin motor proteins move across tracks of ___________________. microfilaments
-Roles of Endomembrane System- *Calcium ion storage *poison detoxification *cisternal maturation *lipid synthesis *protein synthesis *protein modification and sorting *macromolecule digestion *autophagy -->lysosome, smooth/rough ER, or golgi? lysosome- macromolecule digestion,autophagy smooth ER- lipid synthesis, Ca+ storage, poison detoxification rough ER- protein synthesis Golgi- protein modification and sorting, cisternal maturation
proteins synthesized by free ribosomes? (cytosol) DNA polymerase, ribosomal protein, actin
proteins synthesized by bound ribosomes? (endomembrane system) ER protein, lysosomal protein, insulin
5 steps of the pathway of secretory proteins from synthesis to secretion in the endomembrane system? endoplasmic reticulum, cis Golgi cisternae, medial Golgi cisternae, trans Golgi cisternae, plasma membrane
Cells are exposed to a high concentration of a radioactively labeled amino acid for a short period to tag proteins that are being synthesized the “pulse” phase The higher the number, the greater the radioactivity-- most likely function of cells
Any unincorporated radioactively labeled amino acids are washed away and large amounts of the same, but unlabeled, amino acid are added. the “chase” phase
exocyto, endocyto, BOTH *require cellular energy *-> surface area of p mem *move substance never physically cross p mem *<- surface area of p mem *form vesicle from inward fold of p mem *require fusion of vesicle with p mem *secrete huge moles out exocyto* -> surface area of p mem, require fusion of vesicale with p mem, secrete huge moles out of cell endocyto* <- surface of p mem, form vesicle from inward fold of p mem both* require cellular energy, move substane never physcially cross p mem
Created by: jsanjuan