Question

The source of small vesicles of secretory Golgi complex is

• A. Plasma membrane
• B. Nucleus
• C. ER
• D. Both B and C

Answer 1

Answer: (D)

Both B and C

The nucleus is the largest and important part of the cell. It is surrounded by two membranes. In most cells, the outer nuclear membrane is continuous with the lumen of the rough endoplasmic reticulum. Rough endoplasmic reticulum (RER) carry ribosomes on their surface for protein synthesis. Several minutes after proteins are synthesized in the RER, most of them leave the organelle within small membrane-bound transport vesicles. These vesicles which bud from regions of RER not coated with ribosomes carry the proteins to Golgi complex. Thus, the correct answer is option D.