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: -The endoplasmic reticulum transports materials within the cell. Mitochondria generate energy for the cell’s activities. Lysosomes contain enzymes that can break down particles entering the cell. Centrioles participate in cell division.

Detailed explanation-3: -Endoplasmic reticulum is a network of membranes inside a cell through which proteins and other molecules move.

Detailed explanation-4: -The endoplasmic reticulum (ER) serves important functions particularly in the synthesis, folding, modification, and transport of proteins. Differences in certain physical and functional characteristics distinguish the two types of ER, known as rough ER (RER) and smooth ER (SER).