Select the correct explanation of how integral membrane proteins arrive at the plasma memberane: O A. chaperones such as Hsp70 bring the folded protein to the plasma membrane where it is inserted through a channel B. integral membrane proteins are attached to the ER membrane via GPI anchors, the ER membrane buds into a vesicle which travels to the Golgi for further processing and then finally to the plasma membrane C. integral membrane proteins have a signal sequence and/or stop transfer sequences that are recognized by SRP. SRP brings the polypeptide + ribosome to the ER where translation continues into the ER until a stop transfer sequence or long stretch of hydrophobic amino acids is recognized and translation stops as the transmembrane domain of the protein moves the ER membrane. The ultimate destination of the ER membrane is the plasma membrane D. there is no such thing as an integral membrane protein

Select the correct explanation of how integral membrane proteins arrive at the plasma memberane: O A. chaperones such as Hsp70 bring the folded protein to the plasma membrane where it is inserted through a channel B. integral membrane proteins are attached to the ER membrane via GPI anchors, the ER membrane buds into a vesicle which travels to the Golgi for further processing and then finally to the plasma membrane C. integral membrane proteins have a signal sequence and/or stop transfer sequences that are recognized by SRP. SRP brings the polypeptide + ribosome to the ER where translation continues into the ER until a stop transfer sequence or long stretch of hydrophobic amino acids is recognized and translation stops as the transmembrane domain of the protein moves the ER membrane. The ultimate destination of the ER membrane is the plasma membrane D. there is no such thing as an integral membrane protein

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Many different cellular processes are regulated by GTP binding proteins - a kind of molecular switch. Their activity is regulated by their GTP/GDP binding status. Select the correct function and activity of Rab-GTP. O A. Rab in its GTP bound state is active and able to participate in vesicle transport B. Rab in its GTP bound state is inactive and prevents vesicle transport O C. Rab in its GTP bound state is active and prevents vesicle transport O D. Rab in its GTP bound state is inactive and able participate in vesicle transport
a. integral memebrane protein that crosses membrane multiple time b. lipid-linked membrane proteins c. peripheral memebrane protein d. integral memebrane protein that crosses membrane ince
What membrane transport family is this protein part of? What are the roles of the different domains of this protein?
Consider the amino acids on the image below. Which of the following amino acids would be most likely to be found in the part of an integral membrane protein that is located within the membrane? (Select all answers that apply.) Asparagine (Asn) Lysine (Lys) Phenylalanine (Phe) Valine (Val) Glutamic acid (Glu) Methionine (Met)
Which of the following proteins is categorized as a multi-pass transmembrane protein (also called the anion exchange protein, because it exchanges chloride and bicarbonate ions in red blood cells)? band 3.0 protein (in the red blood cell membrane) COX-1 (in the lumenal leaflet of the smooth endoplasmic reticulum) glycophorin A (in the red blood cell membrane) the Ras protein (lipid-linked to the inner plasma membrane) cytochrome c (in the mitochondrion)
Give typed full explanation
1) Describe the role of the signal sequence and the signal recognition particle (SRP) in targeting and processing proteins in the endoplasmic reticulum. 2) What is the function of the trans-Golgi network?
Do you think there are concentration gradients? If so, for which ions are there concentration gradients? Specify whether the concentration values of these ions are higher or lower inside the cell.
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The binding of sodium ions (Na+) to a membrane protein is one of the first steps in initiation of the sodium-potassium pump that moves these ions across the membrane. The picture shows the inital set up in this process. How does the protein get the energy needed to continue the process of moving the (Na+) across the cell membrane? Membrane Protein ONa+ Inside the Cell A. O O Nat oc Outside the Cell Con Mitochondria will attach to the protein and provide the energy to push the Na+ through the protein. Energy from ADP is released and a channel in the membrane protein permanently B. opens, resulting in the passage of the Nat. Energy produced from the difference in solute concentration on both sides of the O c. membrane pulls the Na+ through the protein. Con с ATP attaches to the protein and releases a phosphate, making energy available to OD. change the shape of the protein and allowing the passage of the Nat.
The LDL receptor is internalized via endocytosis every ten minutes and recycled to the membrane. How does the cell recycle the receptor and not the ligand (in this case LDL)? A. The high pH (~10) of the early endosome causes dissociation of LDL from the receptor and the receptor is segregated into recycling endosomes. B. The low pH (~5) of the early endosome causes dissociation of LDL from the receptor and the receptor is segregated into recycling endosomes. O C. A targeting sequence on the ligand sorts it to the late endosome/lysosome. D. This is an error-prone process, the ligand often gets recycled accidentally.
When the slime mold receives its own autocrine signal of CAMP the response is the activation of transcription of transmembrane adhesion molecules. These adhesion molecules need to be transcribed, translated and shipped to the plasma membrane. This response is an example of O a endocytosis O b. exocytosis Oc. phagocytosis Od. endosomal recycling