Indicate whether each of the following descriptions better applies to COPI, COPI
ID: 211121 • Letter: I
Question
Indicate whether each of the following descriptions better applies to COPI, COPII or clathrin-coated vesicles.
They mediate transport from the ER to the cis Golgi network.
They are involved in retrograde transport in the Golgi.
They are involved in transporting mannose-6-phospate containing molecules to the correct loaction.
These form at the plasma membrane as part of the endocytic process.
COPII coated vesicles
COPI coated vesicles
clathrin-coated vesicles
- A. B. C.They mediate transport from the ER to the cis Golgi network.
- A. B. C.They are involved in retrograde transport in the Golgi.
- A. B. C.They are involved in transporting mannose-6-phospate containing molecules to the correct loaction.
- A. B. C.These form at the plasma membrane as part of the endocytic process.
A.COPII coated vesicles
B.COPI coated vesicles
C.clathrin-coated vesicles
Explanation / Answer
COPII-coated vesicles mediate transport from ER to the cis Golgi network, because COPII-coated vesicles are capable of carrying its cargo along the secretory pathway to the Golgi apparatus. As the COPI-coated vesicles are capable of mediating retrograde transport from cis-Golgi back to the ER, the answer for this question will be B, which indicates COPI-coated vesicles. Clathrin-coated vesicles are involved in transporting mannose-6-phospate containing molecules to the correct location. Clathrin-coated vesicles form at the plasma membrane as part of the endocytic process, because the clathrin-coated vesicles are known to be capable of mediating endocytosis from the plasma membrane to endosomal compartments and the Golgi.