some secretory proteins and some intergral embrane proteins must pass through a membrane a ribon

Name: some secretory proteins and some intergral embrane proteins must pass through a membrane a ribonucleoprotein 88691
Uploaded: 2023-08-01T05:34:48-08:00
Duration: 2 min 51 s
Channel: Sri K
Description: some secretory proteins and some intergral embrane proteins must pass through a membrane a ribonucleoprotein 88691

Step 1: Understand the context of secretory proteins and integral membrane proteins. These prote

Some secretory proteins and some intergral embrane proteins...

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What is the difference between an integral membrane protein and other secretory proteins

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D. Ribosomal proteins are translated in the endoplasmic reticulum and imported into the nucleus where they assemble with rRNAs. 24. If mRNA is mispliced and what was once an intron now becomes coding sequence, what may happen? A. You will always have a frameshift that will cause the appearance of new stop codons. B. The new coding sequence could be spliced in-frame, which could result in new amino acids in the protein. C. Misplicing of mRNA can never occur. D. None of the above. 25. Proteins that help fold other proteins are called.. A. Translocases B. Proteases C. Glycosidases D. Chaperones E. Insulators 26. Why are incorrectly folded proteins a problem for the cell... A. Residues that normally might be buried in the interior are now exposed to the cytoplasm causing aggregation. B. The protein would be non-functional. C. Misfolded proteins might be toxic. D. All of the above. E. None of the above. 27. mRNA capping is where a 7-methyl guanisine linkage is placed at the 5' end of the mRNA in a ________ linkage. A. 5' to 1' B. 5' to 2' C. 5' to 3' D. 5' to 4' E. 5' to 5' 28. The C-terminal tail of RNA polymerase is important because it ..... A. Mediates the addition of nucleotides during transcription. B. Serves as an anchor for the ribosome C. Serves as a scaffold for RNA modification enzymes D. All of the above. 29. To isolate protein complexes and study protein-protein interactions, the cells can be lysed with A. Non-ionic detergents B. Ionic detergents C. Glycerol D. Strong base solution E. Acetone 30. You are an electrophysiologist studying long term potentiation at the CNS synapse. In your experiment, you apply a protein synthesis inhibitor. What would happen to LTP? A. LTP will be completely abolished B. LTP will be enhanced C. LTP will still occur but will degrade over time D. There will be no synaptic transmission whatsoever E. None of the above 31. What properties of a protein might signal that it is a transmembrane protein? A. A hydrophobic stretch of approximately 20 amino acids that could form a transmembrane alpha helix. B. A hydrophilic stretch of approximately 20 amino acids that could form a transmembrane alpha helix. C. A stretch of lysine residues at the C-terminus. D. All of the above. 32. A surface transmembrane protein, when it's in a transport vesicle has a certain topology. The extracellular domain of the protein, when found in a transport vesicle would be located in the.. A. Cytoplasm B. Lumen of the vesicle C. It must be cleaved off to enter the vesicle

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Organelles: Trace the path of a secreted protein through the various organelles which it will encounter. What might be happening to the protein in each of these organelles? Describe how a secreted protein gets targeted to the secretion pathway during gene expression: Path of a Secretory Protein Through the Endomembrane System. Proteins destined for secretion are made on ribosomes bound to the RER. The proteins move through the endomembrane system and are dispatched from the Golgi apparatus in transport vesicles that move through the cytoplasm and then fuse with the plasma membrane, releasing the protein to the outside of the cell. Examples of secretory proteins are collagen, insulin, and digestive enzymes of the stomach and intestine. In a similar way, proteins destined for a particular cell organelle move to the organelle in transport vesicles that deposit their contents in the organelle by membrane fusion.

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