Respuesta :
Answer; The correct answer for the blank is-
C) rough ER ( rough endoplasmic reticulum).
mRNA is translated to form protein at ribosomes.
The proteins that are required to be secreted outside the cell are first transported to the endomembrane system ( which includes endoplasmic reticulum and golgi complex).
In the endoplasmic reticulum, post translational modification of protein takes place ( such as proper folding of protein). They are dispatched from the ER and move to golgi complex.
Finally, the vesicles ( containing proteins) exit from golgi, fuse with the cell membrane and are released outside the cell.
Example- When insulin is synthesized, it passes through the ER, where it is cut, folded and held in proper shape with the help of disulfide (-S-S-) bridges.
Thus, option C) is the right answer.
