Search results
Transcription. A gene is a sequence of nucleotide bases in a DNA molecule that codes for the production of a specific sequence of amino acids, that in turn make up a specific polypeptide ( protein) This process of protein synthesis occurs in two stages: Transcription – DNA is transcribed and an mRNA molecule is produced.
During translation, which is the second major step in gene expression, the mRNA is "read" according to the genetic code, which relates the DNA sequence to the amino acid sequence in proteins...
People also ask
How a gene is transcribed into a complementary mRNA molecule?
How mRNA is translated into a protein molecule?
How does a double helix synthesis a new strand?
How mRNA is made?
Transcription overview. Transcription is the first step of gene expression. During this process, the DNA sequence of a gene is copied into RNA. 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.
- What is the benefit of the coding strand if it doesn't get transcribed and only the template strand ...Having 2 strands is essential in the DNA replication process, where both strands act as a template in creating a copy of the DNA and repairing dama...
- During DNA replication ,DNA ligase enzyme is used alongwith DNA polymerase enzyme so during transcri...*Great question*! Not during normal transcription, but in case RNA has to be modified, e.g. bacteriophage, there is T4 RNA ligase (Prokaryotic enzy...
- Why does RNA have the base uracil instead of thymine?To add to the above answer, uracil is also less stable than thymine. RNA molecules are constantly being taken apart and put together in a cell, and...
- i heard ATP is necessary for transcription. Which process does it go in and where? (initiation, elon...ATP is need at point where transcription facters get attached with promoter region of DNA , addition of nucleotides also need energy durring elonga...
- What about termination in eukaryotes?Termination in eukaryotes is much more complex and varies depending on the gene and organism. But generally, as mentioned in the article, a polyade...
- so there are many promoter regions in a DNA, which means how RNA Polymerase know which promoter to s...This is a good question, but far too complex to answer here. In fact, this is an area of active research and so a complete answer is still being wo...
- Concerning Rho-independent termination, why does the RNA fold back onto itself after reaching the C-...If you had, say, a paper clip, and you stretched it out so the wire was straight, and then hold it by one end and press it into a wall, what would...
- Do promoters and terminators get copied into the new transcript? Are they are part of the new RNA tr...Promoters and terminators do not get copied into the new transcript. The promoter is there to tell the RNA to "get ready" and signal the start of t...
- According to my notes from my biochemistry class, they say that the rho factor binds to the c-rich r...The article says that in Rho-independent termination, RNA polymerase stumbles upon rich C region which causes mRNA to fold on itself (to connect C...
Introduction. DNA replication, or the copying of a cell's DNA, is no simple task! There are about 3 billion base pairs of DNA in your genome, all of which must be accurately copied when any one of your trillions of cells divides 1 . The basic mechanisms of DNA replication are similar across organisms.
- Is topoisomerase same as DNA gyrase ?DNA Gyrase is a topoisomerase. There are several kinds
- In the last section "DNA replication in Eukaryotes" it says that in eukaryote cells a little DNA at ...At the ends of DNA strands there is a section non-coding nucleotides that we call a telomere. The telomere is what gets shorter every time a cell d...
- How are the histone proteins taken care of during eukaryotic DNA replication?The DNA is first unwound at origins of replication and the displaced histone proteins move onto to other parts of the DNA that haven't been unwound...
- The part of the article that deals with the Okazaki-fragments states that: "DNA polymerase I and DNA...Yep, that was a typo! I've fixed it now and it should be corrected on the site shortly. Thanks for noticing!
- "Many DNA have proofreading activity" mentions : "In most cases, the correct nucleotide is indeed ad...The key word is the "usually." The reaction won't occur with a mis-paired base in most cases. However, about 1 in 10^5 base pairs will involve an i...
- Why are the DNA polymerases numbered here? (I/II/III) I though that Eu-k were named by alpha beta de...Prokaryotes have DNA polymerases I, II, III, eukaryotes have alpha, delta, epsilon and such.
- In the paragraph 'DNA polymerases' it says that polymerase II has a DNA repair function, but in 'Man...Great question! Yes, DNA polymerase II is involved in repair of damage that occurs outside the context of DNA replication, such as cross-links betw...
- 'A DNA molecule “unzips” as the hydrogen bonds between bases are broken, separating the two strands....Helicase enzyme. It binds at replication initiation site and moves along DNA, in front of polymerase III, opening replication fork.
- Genome refers to the haploid content of DNA in a cell, so how can it consist of 3 billion base PAIRS...Most DNA exists as a double-stranded DNA in a double helix — the strands are held together by base pairs and we usually think of this as a single m...
- What direction does DNA synthesis happen? 5' to 3' or opposite? Also, what direction is leading and ...I found this on Nature.com: “DNA is always synthesized in the 5'-to-3' direction, meaning that nucleotides are added only to the 3' end of the grow...
We are simply suggesting that the best way to understand the chemical structure of mRNA is to start with a strand of DNA and make the two changes described. As another way of wrapping your head around the subtle differences between DNA and RNA, have a look at the following chart.
Q6. Put the events of protein synthesis in the correct order. 1. - The DNA genetic code of a gene is copied to form a messenger molecule, mRNA. 2. - The mRNA detaches from the DNA and is small enough to leave the nucleus. 3. - In the cytoplasm, the mRNA attaches to a ribosome. 4.
Jul 30, 2022 · Like DNA replication, there are three stages to transcription: initiation, elongation, and termination. Figure 2. Transcription: from DNA to mRNA. In the first of the two stages of making protein from DNA, a gene on the DNA molecule is transcribed into a complementary mRNA molecule.
