What is synthesized by RNA polymerase II? - Toppr
RNA polymerase II (Pol II) catalyzes the synthesis of mRNAs and some specialized RNAs. RNA polymerase III (Pol III) synthesizes tRNAs, the 5S rRNA, and some other small specialized RNAs. Prokaryotes have a single type of RNA polymerase that synthesizes all the three types of RNAs (tRNA, rRNA and mRNA). Option C is correct.
Consider the following statements and choose the correct option.
RNA polymerase I synthesize preribosomal RNA (pre-rRNA), which contains the precursor for the 18S, 5.8S, and 28S rRNAs. RNA polymerase II transcribes the presursor of mRNA which is heterogenous RNA (hnRNA).
During transcription, RNA polymerase binds to which site of the
These transcription factors bind to the operator region which is located just upstream the binding site of the RNA polymerase and hence prevent the binding and transcription. Enhancers are the upstream activation sites present within promoter and interact with protein other than RNA polymerase thereby regulating the activity of the promoter.
Name the enzyme that facilitates opening of DNA helix during
Read the following statements regarding transcription. 1. RNA polymerase initiates the process of transcription with the help of sigma factor. 2. RNA polymerase also facilitates opening of the DNA double helix in prokaryotes. 3. Transcription requires primer. 4. In bacteria, there are three types of RNA polymerases.
Which one of the following makes use of RNA as a template to
The RNA polymerase that synthesizes RNA using DNA strands as the template is called DNA-dependent RNA polymerase, it is the enzyme that catalyzes the transcription process. On the other hand, the enzyme which synthesizes DNA using an RNA template is called reverse transcriptase because the process goes in just the opposite direction to normal ...
The enzyme responsible transcription isDNA polymerase IReverse …
Transcription is when RNA is made from DNA. During transcription, RNA polymerase makes a copy of a gene from the DNA to mRNA as needed. During transcription, the DNA site at which RNA polymerase binds is called as promoter. Transcription commences with one or more sigma factor protein binds to the RNA polymerase holoenzyme, allowing it to bind ...
DNA-dependent RNA polymerase catalyze transcription on one
B. DNA dependent DNA polymerase requires RNA primer for initiating replication but DNA dependent RNA polymerase does not require any primer for transcription. C. During replication, unwinding of DNA double helix forms a fork-like structure called replication fork.
During expression of an operon, RNA polymerase binds to - Toppr
Correct option is D) Promoter gene acts as an initiation signal which functions as recognition center for RNA polyrmerase provided the operator gene is switched on. RNA polymerase is bound to the promoter gene. When the operator gene is functional, the polymerase moves over it and reaches the structural genes to perform transcription.
In transcription in eukaryotes, heterogenous nuclear RNA (hn …
Eukaryotes have three RNA polymerases. RNA polymerase I is located in the nucleolus and transcribes for RNAs (28S, 18S and 5.8S) whereas RNA polymerase II is localised in the nucleoplasm and used for hnRNA, mRNA and RNA polymerase Ill is localised in the nucleus, possibly the nucleolar-nucleoplasm interface and transcribes for tRNA, 5S, RNA and nRNAs.
Choose the correct answer from the alternatives given :The RNA
Transcription involves 3 seperate processes: initiation, elongation, termination. Initiation begins when the RNA polymerase binds to the promoter which serves only as a target site for binding of the RNA polymerase and is not transcribed. Each gene contains a specific promoter region for guiding the begining of transcription.