Question

Lipid molecules in the cells are synthesized by:
(a) Smooth endoplasmic reticulum
(b) Rough endoplasmic reticulum
(c) Golgi apparatus
(d) Plastids

Answer 1

They are a meshwork of thin disk-like tubular membrane vesicles. They are a part of a continuous membrane organelle within the cytoplasm of eukaryotic cells. They don’t have ribosomes.

Complete answer:
The endoplasmic reticulum (ER) may be a network of membranes that's present inside eukaryotic cells. These structures are liable for the assembly and transportation of proteins, fats, and other essential molecules required for the functioning of a cell.
The smooth endoplasmic reticulum features a tubular form. It participates within the production of phospholipids, the chief lipids in cell membranes, and are essential within the process of metabolism. Smooth ER is additionally liable for the assembly and secretion of steroid hormones. It’s also liable for the metabolism of carbohydrates. The graceful ER stores and releases calcium ions. These are completely essential for the nervous system and muscular system.

Plastids are double-membrane organelles that are found within the cells of plants and algae. Plastids are liable for the manufacturing and storing of food.
In the Rough endoplasmic reticulum, the ribosomes are embedded within its structure and provide a rough touch or appearance.

Golgi Body’s main function is the packaging and secretion of proteins. It receives proteins from the Endoplasmic Reticulum. It packages it into membrane-bound vesicles, which are then transported to varied destinations, like lysosomes, plasma membrane, or secretion.

Hence, the correct answer is option (A)

Note: Porter and Thompson (1945) discovered Endoplasmic Reticulum. In 1953 Porter gave the name endoplasmic reticulum. The graceful endoplasmic reticulum (SER) is distinguished from the rough endoplasmic reticulum (RER), the other basic sort of endoplasmic reticulum, by its lack of ribosomes, which are protein-synthesizing particles that will be found attached to the outer surface of the RER to offer the membrane its “rough” appearance. SER is found both in animals and in plant cells.