(Solved): 1. The picture below shows a receptor protein that allows a cell to respond to signals in the extra ...

1. The picture below shows a receptor protein that allows a cell to respond to signals in the extracellular environment. Assuming the receptor was made in this cell, how did the receptor get to the plasma membrane? A. It was translated on a ribosome bound to the plasma membrane B. It was transported to the plasma membrane in a vesicle that budded from the Golgi C. It was directly threaded into the plasma membrane through a protein translocator D. It moved from the lysosome to the plasma membrane 2. Based on the orientation of the receptor in the plasma membrane shown in question 1, what can you determine about the protein sequence of the receptor? A. This protein contained an $\mathrm{N}$-terminal ER signal sequence and a stoptransfer sequence B. This protein contained an internal start-transfer sequence and a stoptransfer sequence C. This protein lacked an $\mathrm{N}$-terminal ER signal but contained a single starttransfer sequence D. This protein lacked an $\mathrm{N}$-terminal ER signal but contained a single stoptransfer sequence 3. Predict the ER membrane orientation of the following polypeptide by drawing the protein in the ER membrane shown below. Don't forget to label the lumen vs cytosol. $\mathrm{N}$ terminus C terminus A. The $\mathrm{N}$-terminus will remain in the membrane, and the $\mathrm{C}$-terminus will be in the ER lumen B. The $\mathrm{N}$-terminus will be in the ER lumen and $\mathrm{C}$-terminus will be in the cytosol C. The $\mathrm{N}$ and $\mathrm{C}$-terminus will be in the cytosol D. The $\mathrm{N}$ and $\mathrm{C}$-terminus will be in the ER lumen E. The $\mathrm{N}$-terminus will be cleaved by off by the signal peptidase, and the $\mathrm{C}$ terminus will be in the cytosol