Question

Proteins destined for extracellular release are packaged in specific vesicles. After packaging, the vesicles bud off and are stored in the cell until a signal is given for their release. When the appropriate signal is received they move towards the membrane and fuse to release their contents.

The cellular organelle, involved in the process described above, is the

A) nucleus
B) ribosomes
C) mitochondria
D) Golgi apparatus

Answer 1

IF "they" are referring to the organelle in the text as "stored in the cell" than we are talking about the Golgi apparatus, so answer D.

Answer 2

Ans. (D). Golgi apparatus.

After synthesis, proteins are packaged and processed by Golgi apparatus. It is a membrane-bound structure, made up of cisternae, stacks of flattened membrane sacs.

After modification in Golgi apparatus, proteins are sent to plasma membrane, lysosomes or other targeted organelles via vesicles depending on the signals present in proteins.

Thus, the correct answer is option (D).