Why is RNA polymerase less accurate than DNA polymerase?
It synthesises single-stranded RNA during the transcription process. Hence the error rate of the RNA polymerase is much higher than the DNA polymerase. The RNA polymerase is slow, inefficient and adds nucleotides 40 to 50 per seconds. But alike DNA polymerase, the RNA polymerase is also important for a cell.
What is the role of the RNA Primase?
Primase is an enzyme that synthesizes short RNA sequences called primers. Primase functions by synthesizing short RNA sequences that are complementary to a single-stranded piece of DNA, which serves as its template. It is critical that primers are synthesized by primase before DNA replication can occur.
What characteristics does RNA have?
RNA also uses a different set of bases than DNA—adenine, guanine, cytosine and uracil, instead of adenine, guanine, cytosine and thymine. Chemically, uracil is similar to thymine, differing only by a methyl group, and its production requires less energy. In terms of base pairing, this has no effect.
Is RNA self replicating?
RNA therefore has all the properties required of a molecule that could catalyze its own synthesis (Figure 6-92). Although self-replicating systems of RNA molecules have not been found in nature, scientists are hopeful that they can be constructed in the laboratory.
Which is the most stable RNA?
There are various forms of RNA in the cells like the rRNA. mRNA and the tRNA. They interact with the proteins to form the ribosomes. They are synthesised and remain in the cells for very longer periods of time. They are degraded after the synthesis of the protein. Thus, the correct answer is option B.