Delivery vans of the cell

Science · Organisms & Life Processes · ages 18-20

Name ______________________ Date ____________

Which route does COPII run?
- Back to the ER
- To the cell surface
- From ER to Golgi
The export line runs Golgi, then ER, then vesicle, then fusion. True or false?
Circle one: True False
COPI ferries strays back to the ER. True or false?
Circle one: True False
How does a vesicle fuse with its target?
- SNAREs zipper the membranes
- Cargo swims free across the gap
- Coats dissolve the target
What is the clathrin coat for?
- Runs from the ER forward to the Golgi stack each cycle
- Returns strays to the ER
- Buds vesicles toward endosomes for sorting
One coat type is blocked. What happens to the cargo that uses it?
- That cargo piles up
- Traffic speeds up
- All coats take over perfectly
A new protein must be secreted. What is its first station after the ribosome?
- The Golgi
- The cell membrane
- The ER
Faster budding is what stops a vesicle fusing with the wrong compartment. True or false?
Circle one: True False

Answer key

For grown-ups. Fold this page away before handing over the rest.

From ER to Golgi · COPII carries fresh cargo forward to the Golgi.
False · Building at the ER comes first and fusion comes last.
True · COPI runs the return leg to the ER.
SNAREs zipper the membranes · Zippering SNAREs pull the two membranes into one.
Buds vesicles toward endosomes for sorting · Clathrin buds from the surface and the trans-Golgi toward endosomes.
That cargo piles up · Each coat admits only matching cargo, so no substitute carries it.
The ER · The ER builds secreted cargo before the Golgi ever sees it.
False · Only matching labels pass the check, so speed cannot address cargo.