Chapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 beckers world of the cellChapter 12 ...
Chapter 12 beckers world of the cell
Adaptor proteins are sometimes called assembly proteins, what do they need - ANSWER-They take
energy ATP or GTP for binding of complexes to the membrane
Complexes traveling by transport vesicles to a different region of the plasma membrane - ANSWER-
transcytosis
COPI - ANSWER-involved in retrograde transport from the golgi back to the ER
COPII - ANSWER-anterograde transport from the ER to the Golgi
Core oligosaccharides commonly have what? - ANSWER-two units of N-acetylglucosamine, nine
mannose units, and three glucose units
Drug detoxification involves - ANSWER-Hydroxylation
Endocytosis - ANSWER-Cell eats external materials
Endoplasmic Reticulum - ANSWER-A continuous network of flattened sacs, tubules, and vesicles
ER Cisternae - ANSWER-membrane bound sacs in ER
ER Lumen - ANSWER-space inside the cisternae
Exocytosis - ANSWER-vesicular transport or secretory vesicles release contents outside of cell
How are phospholipids transferred? - ANSWER-by phospholipid translocators (flippases)
How do proteins and lipids leave the Golgi complex? - ANSWER-Transport vesicles from the trans-
golgi network
How do proteins know where to go? - ANSWER-Each protein has a tag for a specific vesicle
How do steroids differ? - ANSWER-Number of carbon chains and hydroxyl groups
How is hydroxylation catalyzed - ANSWER-by cytochrome-P450 (for drug detoxification)
How phospholipids move from the ER to other organelles? - ANSWER-By phospholipid exchange
proteins
NSF and SNAPs - ANSWER-release of the snares of the donor and target membranes
phagocytosis - ANSWER-cellular eating of large particles
pinocytosis - ANSWER-cellular drinking
Rough ER is the site for - ANSWER-Initial steps of glycoproteins, folding of polypeptides, recognition
and removal of misfoled protiens, and assembly of multimeric protein complexes
SNARE hypothesis - ANSWER-the sorting and targeting of vesicles involves two families of SNARE
proteins (SNAP receptor)
Target-SNAP receptors are found on - ANSWER-target membranes
Types of ligand-receptor complexes traveling - ANSWER--complexes carried to a lysosome for
degradation
-complexes are carried to the TGN where they enter a variety of pathways
-complexes can also travel by transport vesicles to a different region of the plasma membrane
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