Question: B) KDEL signals d) botulinum toxin c) clatherin e) stabilin 5. A radioactively labeled protein is…


b) KDEL signals d) botulinum toxin c) clatherin e) stabilin 5. A radioactively labeled protein is made by cells and followed through the various organelles in the secretory pahway. After six hours, all of the radioactivity is still in the Golgi apparatus. This suggests that the a) protein was not translated by the ribosomes. b) protein does not possess a signal peptide for localization within the lumen of the rough endoplasmic reticulum c) protein possesses a signal for localization within the Golgi apparatus. di all of the above. d) chromic fatigue syndrome. 7. People who have the O blood type an enzyme that adds an RBC membrane gl ealactosamine (GleNac) to the end of the oligosaccharide chain on (GleNac) 2) possess an enzyme that adds a galactose (Gal) to the end of the oli glycolipids 3) possess an enzyme that adds phospholipids to the end of the oligosaccharide chain on glycolipids RBC membrane 4) possess two enzymes capable of attaching galactose and N-acetylgalactosamine to the oligosaccharide chain on RBC membrane glycolipids 5) do not have the enzymes that adds neither galactose and N acetylgalactosamine to the end of the oligosaccharide chain on RBC membrane glycolipids A) 1 B) 2 C 3 D) 4 8. Which of the following statements is false regarding endocytosis? a) It involves ingestion of solid particles and fluids by the cell. b) Two types are pinocytosis and receptor-mediated endocytosis. c) It is a method used predominantly by amoeba to obtain food. d) It is mediated by clathrin at the plasma membrane. e) In vertebrates, macrophages and neutrophils possess this ability 9. How do misfolded protei ins get to the cytoplasm to be destroyed? a) They diffuse freely through the lipid bilayer. b) A process called reverse transcription takes proteins back through the translocons they passed through on their way into the ER lumen. c) They diffuse through gap junctions. d) An enzyme flips them through the hydrophobic part of the lipid bilayer. e) Proteins are transported back to the cytosol through the translocon that is situated just beneath a where they will eventually be degraded. The high intracellular concentration of K in a resting animal cell is partly due to a) the K leak channels in the plasma membrane. c) voltage-gated K channels in the plasma membrane. d) the membrane potential. b) the Na*-K pump in the plasma membrane. e) intracellular stores of K in the endoplasmic reticulum. The scientist(s) who developed the sandwich model of the cell membrane is (are) a) Overton. a) Langmuir. d) Davson and Danielli. ) Gorter and Grendel.

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b) KDEL signals d) botulinum toxin c) clatherin e) stabilin 5. A radioactively labeled protein is made by cells and followed through the various organelles in the secretory pahway. After six hours, all of the radioactivity is still in the Golgi apparatus. This suggests that the a) protein was not translated by the ribosomes. b) protein does not possess a signal peptide for localization within the lumen of the rough endoplasmic reticulum c) protein possesses a signal for localization within the Golgi apparatus. di all of the above. d) chromic fatigue syndrome. 7. People who have the O blood type an enzyme that adds an RBC membrane gl ealactosamine (GleNac) to the end of the oligosaccharide chain on (GleNac) 2) possess an enzyme that adds a galactose (Gal) to the end of the oli glycolipids 3) possess an enzyme that adds phospholipids to the end of the oligosaccharide chain on glycolipids RBC membrane 4) possess two enzymes capable of attaching galactose and N-acetylgalactosamine to the oligosaccharide chain on RBC membrane glycolipids 5) do not have the enzymes that adds neither galactose and N acetylgalactosamine to the end of the oligosaccharide chain on RBC membrane glycolipids A) 1 B) 2 C 3 D) 4 8. Which of the following statements is false regarding endocytosis? a) It involves ingestion of solid particles and fluids by the cell. b) Two types are pinocytosis and receptor-mediated endocytosis. c) It is a method used predominantly by amoeba to obtain food. d) It is mediated by clathrin at the plasma membrane. e) In vertebrates, macrophages and neutrophils possess this ability 9. How do misfolded protei ins get to the cytoplasm to be destroyed? a) They diffuse freely through the lipid bilayer. b) A process called reverse transcription takes proteins back through the translocons they passed through on their way into the ER lumen. c) They diffuse through gap junctions. d) An enzyme flips them through the hydrophobic part of the lipid bilayer. e) Proteins are transported back to the cytosol through the translocon that is situated just beneath a where they will eventually be degraded. The high intracellular concentration of K in a resting animal cell is partly due to a) the K leak channels in the plasma membrane. c) voltage-gated K' channels in the plasma membrane. d) the membrane potential. b) the Na*-K' pump in the plasma membrane. e) intracellular stores of K in the endoplasmic reticulum. The scientist(s) who developed the "sandwich" model of the cell membrane is (are) a) Overton. a) Langmuir. d) Davson and Danielli. ) Gorter and Grendel.

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