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Of the major vesicular transport pathways of the cell which one involves transport from the golgi to the endoplasmic reticulum?
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Retrieval
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Vesicular transport fromt he endoplasmic reticulum to the golgi typically invovles which type of coated vesicles?
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COPII
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Which of the following make up the coates of clathrin-coated vesicls?
A) sar1 proteins
B) sec 24 proteins
C) triskelions
D) all of the above
E) A, B, and D only
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C) trisklions
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True or False: Processing of glycosylated proteins primarily occurs in the golgi apparatus.
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True
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Which of the follwoing are fates of endocytosed receptors?
A) recycling
B) transcytosis
C) degradation
D) all of the above
E) A and B only
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D) all of the above
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Which of the following statements are true about lysosomes?
A) Can destroy phagocytized microorganisms
B) Are related to plant vacuoles
C) Carry out primarily catabolic reactions
D) Pump protons into themselves for optimal function
E) All of the above are true
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E) all of the above are true
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True or False: PIP phosphate functins in clathrin-coated vesicle uncoating.
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True
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Where are the mitochondrial genome, ribosomes, and citric acid cycle enzymes located?
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The matrix
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What substrates are used by the mitochondria to produce energy?
A) CO2 and water
B) O2 and acetyl-CoA
C) water and carbohydrates
D) CO2 and O2
E) none of the above
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B) O2 and acetyl-CoA
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True or False: NADH/NAD+ isa redox reactin pair that has a low redox potential, indicating a low affinity for electrons.
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True
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Which complex of the respiratory chain receives electrons from ubiquinone and transfers them to cytochrom c?
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Cytochrom b-c1
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Which structure of the chloroplast corresponds tothe mitochondrial matrix?
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Stroma
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Which of the following occur in th light reactions of the chloroplast?
A) carbon-fixation
B) photosynthetic electron transfer
C) sunlight energy excitement ofchlorophyll electron
D) all of the above
E) B and C only
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E) B and C only
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Dark reactions...
A) require ATP ad NADPH
B) use CO2
C) produce amino acids and fatty acids
D) produce sugars
E) all of the above
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E) all of the above
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The lab you work in has discovered a previously unidentified extracellular signal molecule called QGF, a 75 kDa protein. You add purified QGF to different types of cells to dtermine its effect on these cells. When you add QGF to heart muscle cells, you observe an increase in cell contraction. When you add it to fibroblasts, they undergo cell division. When you add it to nerve cells, they die. When you add it to glial cells, you do not see any effect on cell division or survival. Given these observations, which of the following statements is most likely to be true?
A) Because it acts on so many diverse cell types, QCF probably diffuses across the plasma mebrane into the cytoplasm of these cells.
B) Glial cells do not have a receptor for QGF
C) QGF acivates different intracellular signaling pathways in heart muscles, fibroblasts, and nerve cells to produce the different responses observed.
D) heart muscle cells, fibroblasts, and nerve cells must all have the same receptor for GQF.
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C) QGF activates different intracellular signaling pathways in heart muscles, fibroblasts, and nerve cells to produce the different responses observed.
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