Question

A multi-enzyme complex consisting of 10 essential proteins with RNA-binding as well as 3'→ 5' exoribonuclease activity. Catalytically inactive but acts as a scaffold for subunits with 3' exonuclease activity.

A) Exosome
B) Ribosome
C) Chaperonin
D) Proteasome

Answer 1

An Exosome is a multi-enzyme complex involved in RNA degradation, acting as a scaffold for subunits with 3' exonuclease activity.

Step-by-step explanation:

The multi-enzyme complex described in the question, consisting of 10 essential proteins with RNA-binding as well as 3'→ 5' exoribonuclease activity, that acts as a scaffold for subunits with 3' exonuclease activity, is known as an Exosome.

Unlike the Proteasome, which degrades proteins, the Exosome is involved in the degradation of RNA. The Exosome is distinct from the Ribosome, which is involved in protein synthesis, and the Chaperonin, involved in protein folding.