Question

Pancreatic cells, which secrete a large amount of digestive enzymes, are labeled with radioactive leucine and then chased for several hours withnonradioactive leucine. Photographic emulsions are prepared at different times during the chase. Where would the black spots appear on an emulsionprepared 3 hours after the pulse?
- Rough ER
- Secretory vesicles
- Golgi apparatus
- Exterior of the cell

Answer 1

Answer:

The answer is:  Exterior of the cell.

Explanation:

Black spots would appear on the exterior of the cell after 3 hours, indicating that the proteins had been secreted from the cell.

This due to:

Exocytosis_ is the process of moving materials from within a cell to the exterior of the cell. This process requires energy and is therefore a type of active transport.