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The step of protein synthesis that occurs in the nucleus is transcription. Transcription is the process of copying the genetic code from DNA into RNA. The RNA molecule that is produced during transcription is called messenger RNA (mRNA). mRNA then travels to the cytoplasm, where it is translated into a protein.
In transcription, the DNA double helix opens up at a specific location called the promoter. A protein called RNA polymerase binds to the promoter and begins to move along the DNA strand, unzipping the helix as it goes. RNA polymerase then uses the exposed DNA strand as a template to synthesize a complementary RNA strand. This RNA strand is the mRNA molecule.
Once the mRNA molecule is complete, it separates from the DNA and travels to the cytoplasm. In the cytoplasm, the mRNA molecule binds to a ribosome. The ribosome then reads the mRNA molecule and uses the information to assemble a protein molecule. The protein molecule is then released from the ribosome and can go on to perform its function in the cell.
Here are the steps of transcription in detail:
Initiation: RNA polymerase binds to the promoter region of DNA.
Elongation: RNA polymerase moves along the DNA strand, unzipping the helix and synthesizing a complementary RNA strand.
Termination: RNA polymerase reaches a termination sequence in the DNA and stops synthesizing RNA.
The mRNA molecule that is produced during transcription is a single-stranded molecule that contains the same information as the original DNA strand. However, the mRNA molecule is modified in a few ways. First, the 5' end of the mRNA molecule is capped with a group of nucleotides called a 5' cap. The 5' cap helps to protect the mRNA molecule from degradation and helps it to bind to the ribosome. Second, the 3' end of the mRNA molecule is polyadenylated, which means that it is added to a long chain of adenine nucleotides. The polyadenylation tail helps to stabilize the mRNA molecule and helps it to be transported to the cytoplasm.
Transcription is a complex process that is essential for protein synthesis. It is the first step in the process of converting genetic information into a functional protein molecule.
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Where is the first step of protein synthesis occur?
on the ribosomes in the cytoplasm of the cell
Why does transcription occur in the nucleus and not in the cytoplasm in eukaryotic cells?
Transcription occurs in the nucleus of eukaryotic cells because that's where the DNA is located. The DNA in the nucleus serves as the template for making RNA, which is the first step in protein synthesis. The cytoplasm, where ribosomes are located, is where translation occurs, using the RNA made in the nucleus to build proteins.
What part of protein synthesis takes place in a ribosome?
Protein synthesis occurs at the ribosomes. A gene is expressed in the form of a protein. A protein is the ultimate product of a gene.
What is the first step in protein is called?
The first step in protein synthesis is called transcription. During transcription, the DNA sequence of a gene is used to create an mRNA molecule that carries the genetic information from the nucleus to the ribosome in the cytoplasm.
What is the first step in protein synythesis?
The first step of protein synthesis is transcription, where the DNA "unzips" to direct the production of a strand of messenger RNA (mRNA). This carries the instructions for the production of protein to the ribosome. Transcription is further divided into three stages: into 3 stages: initiation, elongation, and termination.
Which process is the frist step of protein synthesis?
Transcription
How many steps are there in protein synthesis?
Protein synthesis involves two main steps: transcription, where the information in DNA is copied into messenger RNA (mRNA) in the nucleus; and translation, where the mRNA is used as a template to assemble amino acids into a protein at ribosomes in the cytoplasm. Each step consists of multiple sub-steps involving different molecules and enzymes.
What is the purpose of transcription. -APEXA. It is the last step in protein synthesis.B. It is the first step in protein synthesis.C. It is the first step in DNA synthesis.D. It is the last step in DNA synthesis?
I have no idea
In eukaryotic cells the first step in protein synthesis is the?
The first step in protein synthesis in eukaryotic cells is transcription, where the DNA sequence of a gene is transcribed into messenger RNA (mRNA) by RNA polymerase. This mRNA carries the genetic information from the DNA in the nucleus to the ribosomes in the cytoplasm for translation.
What comes after DNA in the protein synthesis?
After DNA, the next step in protein synthesis is transcription. During transcription, a complementary RNA molecule called messenger RNA (mRNA) is synthesized from the DNA template in the cell nucleus. This mRNA carries the genetic information from the DNA to the ribosomes in the cytoplasm for translation.
Why is the Nucleolus located in the Nucleus?
That's a good question; it would seem that the nucleolus should be in the cytoplasm since that is where protein synthesis takes place. I don't know if there is a definite answer to this, but here is my explanation: the nucleolus' main function is to create ribosomes (rRNA). The first step of ribosome creation is the transcription of rDNA by an enzyme called RNA polymerase I. I'm assuming that this enzyme is primarily located in the nucleus, which makes the nucleus a natural location for ribosome formation, and therefore a great place for the nucleolus.
Why is accurate initiation of protein synthesis important?
It is the first step in creating proteins.
