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- Hepatitis C viral infection causes the Golgi apparatus in cells to degrade. Which of the following would be a likely outcome for someone infected with hepatitis C? A. Removal of foreign substances and worn-out cell components would be prevented B. Synthesized proteins would be packaged into transport vesicles at a slower rate C. Ribosomal function would decrease D. Secretory proteins would be prevented from being secretedThe cells lining the small intestine rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information which transport mechanism is most probably functioning in the intestinal cells? a) simple diffusion b) phagocytosis c) active transport pump d) exocytosis e) Facilitated diffusion. Many viruses enter host cells through receptormediated endocytosis. What is an advantage of thisentry strategy?a. The virus directly enters the cytoplasm of the cell.b. The virus is protected from recognition by whiteblood cells.c. The virus only enters its target host cell type.d. The virus can directly inject its genome into thecell’s nucleus.
- Proteins that are trafficked through the secretory pathway of eukaryotic cells are never exposed directly to the cytoplasm. Which of the following is the best explanation for why this is true? A. Cells that specialize in protein secretion lack cytoplasm, because protein synthesis machinery takes up the volume of the cell instead. B. For a protein that will be secreted, during the whole time that it spends inside of the cell, it is enclosed within other membrane-bound compartments. C. While a protein is in the secretory pathway, it is surrounded by a dense cloud of ions that protect it from the cytoplasm. D. A protein that will be secreted is not synthesized by ribosomes in the cytoplasm; instead, it is synthesized by proteins at the plasma membrane and fed directly into the extracellular space.How do proteins get to the Golgi body? A. They are translated directly into the Golgi body B. They are transported there by other proteins C. They are transported in a vesicle D. They move directly from the ER to the Golgi because they are connected continuouslyOne is true about smooth endoplasmic reticulum A. It lacks ribosomes B. It is site of Ca2+ sequestration C. It is involved in detoxification of organic molecules D. It is th site of steroid hormone synthesizes E. It is the site of protein synthesis
- Where are proteins for export produced? A. Golgi apparatus B. Rough endoplasmic reticulum C. Cytoplasmic (free) ribosome D. Mitochondria E. Smooth endoplasmic reticulumUse the EGF Pathway passage to answer the questions. Part A Which of these structures, if present in a prokaryote, would prevent the organism from using this type of actin polymerization to chemotax toward a signal? A. cell wall B. flagellum C. mitochondrion D. ribosome Part B In the model proposed, which of these events MOST likely occurs to facilitate chemotaxis? A. Integrins anchor the cell to extracellular components. B. Motor proteins move actin toward the leading edge. C. Mitochondria migrate away from the leading edge. D. Desmosomes anchor the cell to other cells. Part C Based on the researcher’s observations on filamentous actin, what other observation regarding cell chemotaxis was MOST likely observed? A. The cell moved toward the source of the signaling molecule only after the addition of Compound A. B. The cell moved away from the source of the signaling molecule only after the addition of Compound A.…Proteins destined for the plasma membrane must move through the secretory pathway. What role is served by the signal recognition particle (SRP) in this process? A. The SRP is required for the binding of mRNA to the ribosome. B. The SRP binds to an amino acid sequence at the beginning of a protein. C. Like HSP90, the SRP aids in protein folding within the ER. D. The SRP is required for the protein to move from the ER to the Golgi.
- Heparan sulfate proteoglycans appertain to which of the following processes?*a. transport by argosomesb. transport by cytonemesc. restricted diffusiond. simple diffusion The model for planar transcytosis is characterized by which of the following?* a. Morphogen-receiving cells employ long actin-based filopodia. b. Morphogens interact with cell surface receptors and coreceptors. c. Lipid-modified morphogens are transported in lipoprotein vesicles. d. Morphogens are transported by repeated rounds of endocytosis and re-secretion. Metamerism is NOT observed in which of the following structures?* a. acron b. rhombomeres c. somites d. vertebral column The anterior structure of the Drosophila is promoted by which of the following events?* a. nanos proteins block the transcription of the caudal gene. b. caudal proteins promote the transcription of the bicoid gene. c. bicoid proteins promote transcription of the…The...... attached to the ER signal sequence of the newly synthesized protein and ribosome attch to the ....... on the ER to direct the entry of the newly synthesized protein in the ER. a) t snare.....v snare. b) Rab.....tethering. c) SRP.....SRP. d) Clathrin..... AdaptinWhich statement is not true of endoplasmic reticulum? A. There is smooth and rough endoplasmic reticulum. B. It is found in all living cells. C. Rough ER has ribosomes bound to it. D. Proteins are transported and modified within it. E. Proteins can be targeted for ER transportation.