Which of the Following is a Characteristic of the Exosome

Question

Which of the following is a characteristic of the exosome?
A)It is a dimer-enzyme complex.
B)It avoids indiscriminate degradation of cellular RNAs.
C)It harbours 5'→3' exoribonuclease activity.
D)It has a fundamental structural pattern consisting of 6 domains arranged in a ring with a central cavity.

Accepted Answer

The exosome is a complex of RNA-degrading enzymes that avoids indiscriminate degradation of cellular RNAs.

Answer: C 
 The exosome complex harbours 5'→3' exoribonuclease activity, which is important for RNA degradation.

Option A is incorrect because the exosome is not a dimer-enzyme complex.

Option D is incorrect because the structural pattern of the exosome consists of 9 domains arranged in a ring with a central cavity.