MoBio RNA Structure and Function Chapter 3

Most cellular RNA molecules are single stranded. They may form secondary structures such as stem-loop and hairpin.

Image

Figure 3-C-1. Secondary structure of RNA. (a) stem-loop. (b) hairpin.

The major role of RNA is to participate in protein synthesis, which requires three classes of RNA:

messenger RNA (mRNA)

transfer RNA (tRNA)

ribosomal RNA (rRNA)

Other classes of RNA include

Ribozymes
The RNA molecules with catalytic activity.

Small RNA molecules
RNA interference and other functions.