Incubation of cells at 20°C blocks the release of proteins from the trans-Golgi.Under such conditions,you would expect to see
A)an increase in exocytosis.
B)a decrease in exocytosis.
C)an increase in endocytosis.
D)a decrease in endocytosis.

Question

Quizplus · Accepted Answer

The trans-Golgi is responsible for sorting and packaging proteins for secretion through exocytosis. Incubating cells at 20°C blocks the release of proteins from the trans-Golgi, meaning that exocytosis will be decreased since the proteins are not being released from the Golgi to be transported to the cell membrane. Endocytosis is not directly affected by the blockage of protein release from the trans-Golgi, so there would be no significant change in the rate of endocytosis. Therefore, the best answer is B, a decrease in exocytosis.

Incubation of Cells at 20°C Blocks the Release of Proteins