The Endomembrane System
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24 Terms
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Enzymes
________ present in the Golgi lumen modify the carbohydrate portion of glycoproteins by adding or subtracting individual sugar monomers.
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Endoplasmic reticulum
________ (ER): a system of membranous channels and saccules.
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Ribosome assembly
________ occurs in the nucleolus.
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Chromosomes
________: composed of DNA and proteins= chromatin.
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Perinuclear space
________: continuous with ER lumen.
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endomembrane system
The ________ regulates protein traffic and performs metabolic functions in the cell.
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Nuclear matrix
________: filamentous network; organizes chromosomes.
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Smooth ER
________: synthesize lipids; metabolizes carbohydrates; detoxifies poison; stores calcium (Sarcoplasmic reticulum)
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H2O + O2
Catalase then converts H2O2 into ________.
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Golgi
The ________ modifies proteins and lipids that arrive from the endoplasmic reticulum.
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Rough ER
________: studded with ribosomes and is the site of protein synthesis and processing.
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Chromosomes
composed of DNA and proteins = chromatin
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Nuclear matrix
filamentous network; organizes chromosomes
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Inner nuclear membrane
specific proteins that act as binding sites for chromatin and for the nuclear lamina
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Outer nuclear membrane
continuous with ER membrane; studded with ribosomes
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Perinuclear space
continuous with ER lumen
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Endoplasmic reticulum (ER)
a system of membranous channels and saccules
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Rough ER
studded with ribosomes and is the site of protein synthesis and processing
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Smooth ER
synthesize lipids; metabolizes carbohydrates; detoxifies poison; stores calcium (Sarcoplasmic reticulum)
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Cis face
receiver (of vesicles)
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Trans face
shipper (of vesicles)
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Components of the endomembrane system
Nuclear envelope
Endoplasmic reticulum
Golgi apparatus
Lysosomes
Vacuoles
Plasma membrane
Endoplasmic reticulum
Golgi apparatus
Lysosomes
Vacuoles
Plasma membrane
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Lysosomes
Spherical organelles containing a single layer membrane
Contain hydrolytic enzymes
Involved in enzymatic breakdown of macromolecules and organelles
Contain hydrolytic enzymes
Involved in enzymatic breakdown of macromolecules and organelles
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Peroxisomes contain
oxidative enzymes which remove hydrogens from specific substrates that in turn produces H2O2
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