Question

In catalyzing the methylation or pseudouridylation of an rRNA, a snoRNA functions as

A. a decoy.

B. a scaffold.

C. a guide.

D. both b and c.

Answer 1

A snoRNA functions as a guide in catalyzing the methylation or pseudouridylation of an rRNA.

Step-by-step explanation:

In catalyzing the methylation or pseudouridylation of an rRNA, a snoRNA functions as a guide.

SnoRNA, which stands for small nucleolar RNA, plays a crucial role in modifying rRNA molecules. These modifications, such as methylation and pseudouridylation, are important for the proper functioning of rRNA in the protein synthesis process.

By binding to specific regions of rRNA, snoRNA guides the enzymes responsible for these modifications, ensuring that they occur at the right sites and in the correct manner.