Secretory proteins are
A) produced by ribosomes on the smooth endoplasmic reticulum.
B) chemically modified in the nucleus.
C) produced by the cell for internal use.
D) released from the cell through the plasma membrane.

Question

Quizplus · Accepted Answer

Secretory proteins are produced by ribosomes on the rough endoplasmic reticulum, which then moves to the Golgi apparatus for modification and sorting. After processing, these proteins are packaged in vesicles and transported to the plasma membrane to be released outside the cell. Therefore, choice D is the best answer as it correctly describes the final destination of secretory proteins.

Secretory Proteins Are