Phospholipids are produced by the and are modified by the ri

Phospholipids are produced by the and are modified by the ribosome/smooth ER golgi apparatus/vesicles rough ER/smooth ER smooth ER golgi apparatus A blood cell (0.9% solutes) placed in seawater (3.5% solutes) will gain water

Solution

Ans. Phospholipids are produced by the smooth ER and are modified by Golgi apparatus.

Correct option D. smooth ER / Golgi apparatus. Smooth ER is the site of phospholipids (and other lipids, too) biosynthesis. The lipids are further transported to GB for any modification, if required.

Option A. Incorrect. Ribosomes is the site of translation of mRNA into proteins. It does not synthesize lipids. So, this combination of options is incorrect.   

Option B. Incorrect. Lipids modification occurs in Golgi bodies (GB). But the vesicles (released from GB) does neither produce nor modify lipids on their own.

Option C. Incorrect. The region of ER bound with ribosomes is called rough ER. Because of its association with numerous ribosomes, rough ER is principally (and primarily) involved in protein synthesis, but not in phospholipid biosynthesis. Moreover, lipid modification takes place in GB. So, this combination of options is incorrect.