Question

Pancreatic cells, which secrete a large amount of digestive enzymes, are labeled with radioactive leucine and then chased for several hours with nonradioactive leucine. Photographic emulsions are prepared at different times during the chase. Where would the black spots appear on an emulsion prepared 3 hours after the pulse? mastering biology quizle

Answer 1

EXTERIOR OF THE CELL.

Step-by-step explanation:

• To examine the cellular processes that take place over time, a pulse-chase experiment can be used.
• In a pulse-chase experiment the cells are first exposed to a labeled compound that is the pulse and then it is exposed to the same compound however in an unlabeled from that forms the chase.
• In the given question, the leucine is labeled and then unlabeled and because pancreatic cells are known to secrete digestive enzymes after 3 hours the black spots will appear at the exterior of the cell.