And finally, we also have something called telomerase RNA component. Now, remember, inside eukaryotic cells we have these enzymes known as telomerase enzymes. And what telomerase basically does is it regulates the ends of our DNA molecules. So inside our cells, unlike in bacterial cells, inside our cells we have a linear DNA molecule and that means we have a beginning and we have an end. And the two ends the sequences of nucleotides on the two ends of the DNA molecule are known as telomeres. And every time we replicate our DNA molecule those telomeres have to be regulated and controlled and it's the telomerase enzyme that regulates and modifies these telomere ends.