Which of the following is the largest single membrane-bound intracellular compartment?
A.
Ribosome
B.
Golgi apparatus
C.
Nucleus
D.
Endoplasmic reticulum
Answer: Option D
Explanation:
Endoplasmic reticulum is a network of closed and flattened single membrane-bound intracellular structure. ER lumen is the enclosed compartment between ER membranes which are physiologically active.
Microsomes are small vesicles formed by the breakdown of ER membrane into fragments. Microsomes which are derived from RER are known as rough microsomes while microsomes lacking ribosomes are called smooth microsome.
Endoplasmic reticulum membrane which is associated with ribosomes is called?
A.
ER lumen
B.
Smooth endoplasmic reticulum
C.
Rough endoplasmic reticulum
D.
Endosome
Answer: Option C
Explanation:
Endoplasmic reticulum membrane has been divided into rough or smooth based on the association of ribosome with their cytoplasmic surface. The region of ER that is bounded with ribosomes is called rough endoplasmic reticulum or RER.
Which of the following is not the function of Glycosylation?
A.
Helps in proper folding of the protein
B.
Confer stability in proteins
C.
Helps in cell-cell adhesion
D.
Synthesis of membrane lipid
Answer: Option D
Explanation:
Glycosylation is the process of attachment of sugars molecule to the nitrogen atom in an amino acid residue of the protein. synthesis of membrane lipid is incorrect, SER produces membrane lipids.