Is RNA polymerase dependent on DNA?

In molecular biology, RNA polymerase (abbreviated RNAP or RNApol, and officially DNA-directed (dependent) RNA polymerase), is an enzyme that synthesizes RNA from a DNA template.

Does RNA polymerase need DNA?

RNA polymerase

RNA polymerases are enzymes that transcribe DNA into RNA. Using a DNA template, RNA polymerase builds a new RNA molecule through base pairing.

Why is RNA dependent RNA polymerase important?

RNA dependent RNA polymerase (RdRp) is one of the most versatile enzymes of RNA viruses that is indispensable for replicating the genome as well as for carrying out transcription. The core structural features of RdRps are conserved, despite the divergence in their sequences.

What is the difference between DNA-dependent DNA polymerase and DNA-dependent RNA polymerase?

The DNA is a double-stranded molecule, while the RNA is single-stranded- formed from the DNA during transcription. Based on that, another difference between both is that the DNA polymerase manufacture double-stranded DNA while the RNA polymerase manufacture a single-stranded RNA.

How does RNA polymerase unwind DNA?

It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter. This signals the DNA to unwind so the enzyme can ”read” the bases in one of the DNA strands. The enzyme is now ready to make a strand of mRNA with a complementary sequence of bases.

How does RNA polymerase separate DNA?

…is catalyzed by the enzyme RNA polymerase. As with DNA replication, the two DNA strands must separate to expose the template. … The first step is to recognize a specific sequence on DNA called a promoter that signifies the start of the gene. The two strands of DNA become separated at this point, and RNA polymerase…

How does RNA polymerase compare to DNA polymerase?

The main difference between DNA and RNA polymerase is that DNA polymerase produces a double-stranded DNA molecule during polymerization whereas RNA polymerase produces a single-stranded RNA molecule during transcription.

What is the best explanation for the relationship between DNA polymerase and RNA polymerase?

What is the function of DNA-dependent DNA polymerase?

DNA-dependent DNA polymerases are responsible for directing the synthesis of new DNA from deoxyribonucleotide triphosphates (dNTPs) opposite an existing DNA template, which contains the genetic information critical to an organism’s survival.

Why is RNA polymerase slower than DNA polymerase?

RNA polymerase is slower in catalyzing synthesis of a polynucleotide chain than are replicative DNA polymerases because RNA is not highly processive…

Why does RNA polymerase make more mistakes than DNA polymerase?

Why does RNA polymerase make more mistakes than DNA polymerase? RNA polymerase does not have proofreading activity. … It would use the bottom strand because the promoter sets the direction and the polymerase moves from 3′ to 5′ along the template strand.

What is the difference between DNA polymerase and RNA polymerase quizlet?

DNA polymerase – An enzyme that assembles new DNA by copying an existing strand. … RNA polymerase – an enzyme that synthesizes the formation of RNA from a DNA template during transcription. RNA is single stranded and uses Uracil as a base.

Is RNA polymerase faster than DNA?

An obstacle to the triviality of the first issue includes the fact that DNA polymerase replicates DNA at a rate of 10-15 times faster than RNA polymerase transcribes DNA so that these enzymes inevitably collide if they attempt to function concurrently and co-directionally (3).

Why is DNA synthesis faster than RNA?

Perhaps the answer here is that there is no selective pressure for faster transcription — the rate is clearly sufficient to supply the needs of the cell — whereas the rate of DNA replication determines the time between cell divisions and thus the rate of growth, which is subject to selective pressure.

What is the function of RNA polymerase in DNA synthesis quizlet?

RNA polymerase unzips the DNA and assembles RNA nucleotides using one strand of DNA as a template. RNA polymerase reaches a special sequence of nucleotides that serves as a termination point.

What is the role of RNA polymerase?

RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.

What is RNA polymerase responsible for quizlet?

RNA polymerase is responsible for transcribing the mRNA from eukaryotic structural genes.

What do DNA polymerase and RNA polymerase have in common quizlet?

What do DNA and RNA have in common? -Both contain deoxyribose. -Both are composed of nucleotides. -Both form double helices.

What structural difference justifies the performance of DNA polymerase and RNA polymerase quizlet?

Differences: (1) RNA polymerases use ribonucleoside triphosphates as substrates, whereas DNA polymerases use deoxyribonucleoside triphophates; (2) DNA polymerases require a primer that provides an available 3′-OH group where synthesis begins, whereas RNA polymerases do not require primers to begin synthesis; and (3) …

What polymerase does DNA use?

DNA polymerase III
In E. coli, the DNA polymerase that handles most of the synthesis is DNA polymerase III. There are two molecules of DNA polymerase III at a replication fork, each of them hard at work on one of the two new DNA strands.

Which of the following characteristics are shared by DNA and RNA polymerase?

Dna And Rna Structure : Example Question #1

DNA and RNA share many characteristics. They are both composed of nucleotide monomers and are read in the 5′-to-3′ direction. They also share the same complementary base pairs, except RNA uses uracil in place of thymine; both contain adenine.