Structure of RNA and Its Importance

This video is the continuation of the previous videos and is focusing on Structure of RNA and Its Importance. The links to the other videos are the following
Even though RNA molecules consist of single strands of nucleotides, their natural urge for pairing with complementary sequences is still there.
Single-stranded RNA molecules pair different regions of their sequences to form stable double-helical structures, much like double-helical structure of DNA.
Once synthesized, each RNA molecule quickly adopts a compact fold, trying to pair as many nucleotides as possible.
Hairpin shapes, are the basic elements of RNA secondary structure; they’re made up of loops (the unpaired) and stems (the paired regions).
The RNA chain folds in a specific 3-D structure dictated by its sequences. The biological function of RNA molecules derives from their 3-D shapes or from their sequence complementarity with specific genes.
The recent discovery that small RNA molecules can switch off the activity of a number of genes, has triggered a renewed interest in these sticky RNA sequences