NEET BIOLOGY

Detailed explanation-1: -Pancreatic acinar cells are highly specialized for digestive enzyme synthesis, storage, and secretion 17, therefore they have abundant endoplasmic reticulum (ER) to meet the protein synthesis rate, the highest among all adult human tissues 18-21.

Detailed explanation-2: -ROUGH ENDOPLASMIC RETICULUM Rough ER is found throughout the cell but the density is higher near the nucleus and the Golgi apparatus.

Detailed explanation-3: -Examples of protein synthesis by the rough endoplasmic reticulum are the proteins produced in secretory cells. These include the digestive enzymes produced in the stomach and the protein hormones like insulin produced in the pancreas.

Detailed explanation-4: -Therefore, rough ER is prominent in liver cells that secrete serum albumin, cells of the digestive system that secrete enzymes, endocrine cells that synthesize and secrete protein hormones (such as insulin) and in cells that create the proteins of the extracellular matrix.

Detailed explanation-5: -RER occurs in both animal and plant cells. The RER membrane is continuous with the nuclear envelope, which surrounds the cell nucleus. The RER is also located near the Golgi apparatus, which transports, modifies, and packages proteins for delivery to targeted destinations.