Cell Biology

Learn the toughest concepts covered in Cell Biology with step-by-step video tutorials and practice problems by world-class tutors

13. Intracellular Protein Transport

ER Processing and Transport

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1

concept

ER Import

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2

concept

Inserting Membrane Proteins

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6m
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3

concept

ER Protein Modifications

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4

problem

Match the following term with its definition 

I. Co-translational import     ______________________ 

II. Post-translational import ______________________ 

III. ER retention signal         ______________________ 

IV. Translocon                      ______________________ 


A. Pore in the ER membrane that binds SRP and SRPR to translocate the protein into ER

B. Signal sequence located on the C-terminus and keeps proteins within the ER 

C. Process of importing proteins into the ER as they’re being translated 

D. importing proteins into the ER after they’ve been translated

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5
Problem

Which of the following is responsible for recognizing the ER signal sequence?

6
Problem

A protein contains 5 start/stop transfer sequences. How many times will this protein cross the membrane?

7
Problem

Glycosylation of proteins in the ER is associated with which of the following molecules or responses?