Question

Golgi body and endoplasmic reticulum are:
A. Made up of cisternae, vesicle and tubule
B. Part of endomembrane system
C. Involved in glycosylation of protein
D. Involved in synthesis of protein.

A) A, B, C & D are true.
B) D is not true
C) A, B & C are not true
D) Only B is true

Answer 1

Hint: Golgi body is a cell organelle of most eukaryotic organisms which is part of the endomembrane system of cytoplasm. Golgi body packages proteins into membrane-bound vesicles inside the cell. In most eukaryotic cells, the endoplasmic reticulum forms an interconnected network of flattened, membrane-enclosed sacs known as cisternae (in the RER) and tubular structures in SER.

Complete answer:
A series of flattened, curved membrane saccules of the endoplasmic reticulum and Golgi apparatus is known as cisternae. The Vesicles are small, membrane-bound sacs within a cell. Vesicles are found in both Golgi bodies and endoplasmic reticulum. The tubules are small tube-like structures that may be found in various structures, cell organelles or organs of the body. Both the tubules and vesicles are examples of mesosomes, and are found in both Golgi bodies and endoplasmic reticulum. (A)
A membranous component of the eukaryotic cell is the endomembrane system. The organelles in cytoplasm of the cells are termed as a system even though they have different structures and functions as they are needed for the working of the cell. These organelles work in coordination with each other, which includes both Golgi bodies and endoplasmic reticulum. (B)
One of the critical functions of the biosynthetic-secretory pathway in both endoplasmic reticulum (ER) and Golgi apparatus is the process of glycosylation. The approximate half of most proteins which are typically expressed in a cell undergo this modification, in which the covalent addition of sugar moieties to specific amino acids. Hence both Golgi bodies and endoplasmic reticulum are involved in glycosylation of proteins. (C)
Both the Golgi apparatus and Endoplasmic reticulum are key organelles that are needed for protein synthesis. Endoplasmic reticulum modifies and folds proteins whereas Golgi bodies package them for transport. Hence both Golgi bodies and endoplasmic reticulum are involved in protein synthesis. (D)
Option A) A, B, C and D are true: Since all of the above given statements are true.
So, option A is the correct answer.
Option B) D is not true: Since statement D is true.
So, option B is not correct.
Option C) A, B & C are not true: Since A, B and C are true statements.
So, option C is not correct.
Option D) Only B is true: Although B is true, the remaining statements are also true.
Hence option D is not correct.

Hence, Option A is the correct answer.

Note:
A major collection and dispatch station of protein products which are received from endoplasmic reticulum is Golgi apparatus. The Golgi apparatus also functions in lipid transport and lysosome formation. Membranes of the endoplasmic reticulum are continuous with the outer nuclear membrane. In both red blood cells and spermatozoa, the endoplasmic reticulum is not found.