What is the base sequence of RNA?
RNA consists of four nitrogenous bases: adenine, cytosine, uracil, and guanine. Uracil is a pyrimidine that is structurally similar to the thymine, another pyrimidine that is found in DNA. Like thymine, uracil can base-pair with adenine (Figure 2).
What is the transcribed RNA sequence?
Transcription is the process in which a gene’s DNA sequence is copied (transcribed) to make an RNA molecule. RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.
What happens after the RNA transcript is made in the nucleus?
Transcription takes place in the nucleus. It uses DNA as a template to make an RNA molecule. RNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. Translation reads the genetic code in mRNA and makes a protein.
What is the 3 base sequence in RNA?
A three base sequence in DNA or RNA is known as a codon. The codes in the coding strand of DNA and in messenger RNA aren’t, of course, identical, because in RNA the base uracil (U) is used instead of thymine (T).
Does transcription occur in the nucleus?
The eukaryotic nucleus therefore provides a distinct compartment within the cell, allowing transcription and splicing to proceed prior to the beginning of translation. Thus, in eukaryotes, while transcription occurs in the nucleus, translation occurs in the cytoplasm.
What is the end result of transcription?
The outcome of Transcription is a complimentary strand of messengerRNA (mRNA).
How do you find the RNA sequence?
DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using ‘T’ as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3′ T C G T T C A G T 5′, the mRNA sequence would be 5′ A G C A A G U C A 3′.
What is the difference between transcription and RNA synthesis?
Transcription • Transcription: production of an RNA strand that is complementary in base sequence to a DNA strand –messenger RNA (mRNA) • RNA is synthesized from template DNA following strand separation of the double helix
Which strand of DNA has the same sequence as the mRNA?
The RNA to which the information is transcribed is messenger RNA (mRNA). Since the other strand of the DNA has bases complementary to the template strand, the mRNA has the same sequence of bases at the upper strand of DNA shown above (with U substituted for T) , which is called the coding strand.
How does RNA polymerase bind to DNA and begin transcription?
To begin transcribing a gene, RNA polymerase binds to the DNA of the gene at a region called the promoter. Basically, the promoter tells the polymerase where to “sit down” on the DNA and begin transcribing. The promoter region comes before (and slightly overlaps with) the transcribed region whose transcription it specifies.
How does DNA double helix unwind before transcription?
Before transcription can take place, the DNA double helix must unwind near the gene that is getting transcribed. The region of opened-up DNA is called a transcription bubble. In transcription, a region of DNA opens up. One strand, the template strand, serves as a template for synthesis of a complementary RNA transcript.