Which type of proofreading does RNA pol II do?
This proofreading mechanism enables Pol II to cleave the dinucleotide containing a mismatched 3-RNA terminus through backtracking-dependent proofreading mechanism to regenerate a new post-translocation state, allowing Pol II to have a second chance to reselect the correct nucleotide for incorporation and elongation.
What does DNA dependent RNA polymerase mean?
n. A polymerase that catalyzes the synthesis of a complementary strand of RNA from a DNA template, or, in some viruses, from an RNA template.
What is the difference between RNA virus and DNA virus?
DNA viruses contain usually double‐stranded DNA (dsDNA) and rarely single‐stranded DNA (ssDNA). These viruses replicate using DNA‐dependent DNA polymerase. Compared to DNA virus genomes, which can encode up to hundreds of viral proteins, RNA viruses have smaller genomes that usually encode only a few proteins.
Do humans have DNA dependent RNA polymerase?
Summary: The presence of mechanisms that copy RNA into RNA, typically associated with an enzyme called RNA-dependent RNA polymerase, has only been documented in plants and simple organisms, such as yeast, and implicated in regulation of crucial cellular processes. …
Which of the following is an RNA dependent DNA synthetase?
Explanation: RNA polymerase I, RNA polymerase II are DNA dependent RNA polymerases and reverse transcriptase is RNA-dependent DNA polymerase. Explanation: Neuraminidase inhibitors are used for the treatment of the influenza virus.
What is complementary in DNA?
Complementary DNA (cDNA) is a DNA copy of a messenger RNA (mRNA) molecule produced by reverse transcriptase, a DNA polymerase that can use either DNA or RNA as a template.
What is the molecule that transcribes RNA into DNA?
Although the mRNA contains the same information, it is not an identical copy of the DNA segment, because its sequence is complementary to the DNA template. Transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors.
Can reverse transcriptase use DNA as a template?
FAQ: Can DNA be used as a template for M-MuLV Reverse Transcriptase? Yes, but the reaction is less efficient (1).
What do we call a virus that attacks a bacterium see Concept 19.1 page 397?
What do we call a virus that attacks a bacterium? See Concept 19.1 (Page 397) phage.
What is the name given to a virus that attacks a bacterium?
Why do RNA viruses appear to have higher?
Why do RNA viruses appear to have higher rates of mutation? Replication of their genomes does not involve proofreading. Viruses, unlike bacteria, lack metabolic enzymes. Viruses lack metabolic enzymes and equipment for making proteins, such as ribosomes.