Question
| A. |
Ubiquitin |
| B. |
RNAse |
| C. |
Zymase |
| D. |
Chaperone |
|
Correct Answer � A Explanation |
 |
Ubiquitin is a small, highly conserved protein (76 amino acid polypeptide), that plays a key role in marking (targeting) & escorting many intracellular proteins mainly abnormal newly produced protein and aged normal protein for degradation (ticket of degradation) in multi-subunit proteolytic particles of 26 S proteasome.
It is also involved in the activation of NFkB, cell cycle regulation (degradation of cycles), DNA repair, and viral infections.
Clathrin is a peripheral membrane protein, that helps in endocytosis. Pepsin is a proteolytic enzyme secreted by the chief cells of the stomach and is used for digestion.
Laminin is found in the extracellular matrix, the most abundant glycoprotein present in the basement membrane.
