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Becker's World of the Cell - Chapter 12 - The Endomembrane System
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Becker's World of the Cell - Chapter 12 - The Endomembrane SystemBecker's World of the Cell - Chapter 12 - The Endomembrane SystemBecker's World of the Cell - Chapter 12 - The Endomembrane SystemBecker's World of the Cell - Chapter 12 - The Endomembrane System

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  • August 28, 2024
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Becker's World of the Cell - Chapter 12
- The Endomembrane System
Anterograde Transport - ANSWER-The movement of material from the ER through the Golgi toward
the plasma membrane

Autophagy - ANSWER-The digestion of old or unwanted organelles or other cell structures

Botulinum Toxin - ANSWER-An acetylcholine antagonist and a protease that cleaves a SNARE protein
required for the fusion of vesicles with muscle cells, which initiates an electrical impulse and muscle
contraction

Calnexin - ANSWER-ER chaperone protein that binds to partially folded proteins and retains them in
the ER until folding is complete

Calreticulin - ANSWER-Soluble ER chaperone protein that binds to the carbohydrate domains of
unfolded proteins, preventing the proteins from leaving the ER

Cis Golgi Network - ANSWER-Site where vesicles containing newly synthesized lipids and proteins
arrive and fuse

Cisternae - ANSWER-Membranous tubes and sacs in the ER

Clathrin Coated Vesicles - ANSWER-Involved in the selective transport of proteins from the ER to the
Golgi

Clathrin Independent Endocytosis - ANSWER-Fluid-phase endocytosis



Process for nonspecific internalization of extracellular fluid



Does not concentrate the ingested material



Proceeds at a relatively constant rate in most eukaryotic cells

Constitutive Secretion - ANSWER-The process by which secretory vesicles move directly to the cell
surface where they fuse with the membrane and release their contents by exocytosis

COPI Coated Vesicles - ANSWER-Facilitate retrograde transport of proteins from the Golgi back to the
ER as well as bidirectional transport of proteins between cisternae and the Golgi

COPII Coated Vesicles - ANSWER-Facilitate anterograde transport of proteins from the ER to the Golgi

Core Oligosaccharide - ANSWER-Initial oligosaccharide segment joined to an asparagine residue
during N-glycosylation of a polypeptide chain; consists of 2 N-acetylglucosamine units, 9 mannose
units, and 3 glucose units

Cytochrome P-450 Proteins - ANSWER-A family of enzymes that catalyze hydroxylation known as
monooxygenases

Cytosolic Phospholipid Exchange Proteins - ANSWER-Proteins that convey phospholipids from the ER
membrane to the outer mitochondrial membrane

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