Describe the endomembrane system
a group of membranes and organelles in eukaryotic cells that works together to modify package and transport lipids and protein s
Compartmentalises organelles
Describe the structure of the ER
network of branching tubules and sacs which interconnect (continuos with outer nuclear membrane)
Has a single internal space called ER lumen
What is the difference between SER and RER?
RER has membrane bound ribosomes. SER doesn’t.
What is the function of SER?
Protein biosynthesis
Protein folding and modification
Removal of incorrect proteins
How does the SER have a role in Ca2+ storage?
Ca2+ pump transports Ca2+ from cytosol into ER lumen where its stored at Ca2+ binding proteins
Last changeda year ago