contain protein and rRNA, site of protein synthesis
ribosomes
tough rope-like protein fibers, resist pulling on cell, attach to desmosomes
intermediate filaments
requires carrier proteins, moves against gradient, uses energy(ATP) to move molecules
active transport
3 types of membrane junctions
tight, desmosome, gap
role of rER in protein synthesis
mRNA-ribosome complex is directed to rER by signal recognition particle
forming protein enters ER
sugar groups may be added to protein and alter shape
protein is enclosed in a vesicle for transport to golgi body
UPS of cell, modifies, concentrates and packages proteins and lipids
golgi apparatus
bind to amino acids and pair with bases of codons of mRNA and ribosome to begin protein synthesis
tRNA
series of rods, important for vesicle transport and cell movement
