LIFE SCIENCE

Detailed explanation-1: -The endoplasmic reticulum (ER) is a network of membrane-enclosed tubules and sacs (cisternae) that extends from the nuclear membrane throughout the cytoplasm (Figure 9.1). The entire endoplasmic reticulum is enclosed by a continuous membrane and is the largest organelle of most eukaryotic cells.

Detailed explanation-2: -4) Endoplasmic reticulum (smooth and rough) is a network of interconnected flattened, membrane-enclosed sac-like structures which are distributed throughout the cytoplasm. It actually forms a continuous membrane system with the nuclear membrane and are the extensions of the infolded plasma membrane.

Detailed explanation-3: -The nucleus is surrounded by a system of two concentric membranes, called the inner and outer nuclear membranes. The outer nuclear membrane is continuous with the endoplasmic reticulum, so the space between the inner and outer nuclear membranes is directly connected with the lumen of the endoplasmic reticulum.

Detailed explanation-4: -Posted August 24, 2021. Yes, the ER (endoplasmic reticulum) and the nucleus are attached through their outer membranes. Specifically, it is the rough ER that is attached to the nucleus. The ER is a large membrane-bound organelle that is spread throughout the cytoplasm of eukaryotic cells.