Biology · Cell Structure and Function

The most important function of Golgi Apparatus is to modify the proteins and lipids by adding carbohydrates and converting them into glycoproteins and glycolipids.

a) Golgi Apparatus: This is the correct option. The Golgi apparatus is responsible for modifying, sorting, and packaging various molecules, including proteins and lipids. One of its important functions is glycosylation, where carbohydrates are added to proteins and lipids to form glycoproteins and glycolipids. 

b) Plasma Membrane: The plasma membrane is the outermost boundary of the cell and is primarily involved in controlling the passage of substances in and out of the cell. While the plasma membrane may contain glycoproteins and glycolipids, it is not the primary cellular structure responsible for adding carbohydrates to proteins and lipids. 

c) Polysome: A polysome is a cluster of ribosomes bound to a single mRNA molecule, engaged in simultaneous protein synthesis. Polysomes are not directly responsible for modifying proteins and lipids by adding carbohydrates. 

d) None of these: This option implies that none of the provided options (Golgi Apparatus, Plasma Membrane, Polysome) is the correct answer. However, based on the information given, option a) "Golgi Apparatus" is the correct answer.