Where does protein synthesis occur

The nucleus contains all the necessary enzymes, proteins, and nucleotides required for this synthesis. A short segment of DNA is “unzipped,” so that the two strands in the segment are separated to serve as templates for new DNA. DNA polymerase, an enzyme, recognizes each base in a template strand and matches it to the complementary base in a free nucleotide. The enzyme then catalyzes the formation of an ester bond between the 5′ phosphate group of the nucleotide and the 3′ OH end of the new, growing DNA chain. In this way, each strand of the original DNA molecule is used to produce a duplicate of its former partner (). Whatever information was encoded in the original DNA double helix is now contained in each replicate helix. When the cell divides, each daughter cell gets one of these replicates and thus all of the information that was originally possessed by the parent cell.

Where does protein synthesis occur? - Quora

Protein Synthesis: Proteins are and protein synthesis also occurs in through nucleopores.

The transcription phase of protein synthesis occurs in the nucleus

We previously stated that deoxyribonucleic acid (DNA) stores genetic information, while ribonucleic acid (RNA) is responsible for transmitting or expressing genetic information by directing the synthesis of thousands of proteins found in living organisms. But how do the nucleic acids perform these functions? Three processes are required: (1) , in which new copies of DNA are made; (2) , in which a segment of DNA is used to produce RNA; and (3) , in which the information in RNA is translated into a protein sequence. (For more information on protein sequences, see .)

The Nucleolus, Ribosomes and Protein Synthesis

DNA replication occurs by the sequential unzipping of segments of the double helix. Each new nucleotide is brought into position by DNA polymerase and is added to the growing strand by the formation of a phosphate ester bond. Thus, two double helixes form from one, and each consists of one old strand and one new strand, an outcome called . (This representation is simplified; many more proteins are involved in replication.)

Protein Synthesis to reach the ribosomes where protein synthesis occurs.
Because Protein synthesis protein synthesis occurs.s of some proteins and promoters in the genes of heat sensitive proteins.

protein synthesis occurs in the ribosome of a cell.


Transcription Process
- the synthesis of RNA using information in the DNA
- messenger RNA (mRNA): a type of RNA, synthesized using a DNA template, that attaches to ribosome in the cytoplasm & specifies the primary
-codon: triplets of nucleotide bases
Transcription Process
- occurs in the nucleus
- occurs in all organisms
RNA Processing
- only occurs in eukaryotic cells
- transcription of a protein-coding eukaryotic gene results in pre-mRNA
- primary transcript: an initial RNA transcript from a protein-coding gene
Translation Process
- the synthesis of a polypeptide using the information in the mRNA
- occurs in all organisms
- occurs in cytoplasm
- cell must translate the nucleotide sequence of an mRNA molecule into the amino acid sequence of a polypeptide
Translation Process
- specific order of codons code for particulsr proteins (different sequences code for different amino acids)
- RNA --> Polypeptide
- Mutations: substitute (may alter amno acid only) & frameshift (may alter the entire chain)
Translation Process
Eukaryotic & Prokaryotic Synthesis
Eukaryotic Synthesis
Transcription:
- 3 RNA polymers
- initiation is more complex
- 3' (3 prime) poly-A tail for termination (a region in the strand that will signal STOP)

Prokaryotic Synthesis
Transcription:
- 1 RNA polymer
- use a TTGACA or TATAAT promoter
- GC hairpin for termination
Eukaryotic Synthesis
-3 prime poly-A tail refers to a sequence in the strand where a series of Adenines are present.

protein synthesis occurs in cellular structures called ribosomes , found out-side the nucleus

The role of the nucleus in protein synthesis in Amoeba

Three types of RNA are formed during transcription: (mRNA), (rRNA), and (tRNA). These three types of RNA differ in function, size, and percentage of the total cell RNA (). mRNA makes up only a small percent of the total amount of RNA within the cell, primarily because each molecule of mRNA exists for a relatively short time; it is continuously being degraded and resynthesized. The molecular dimensions of the mRNA molecule vary according to the amount of genetic information a given molecule contains. After transcription, which takes place in the nucleus, the mRNA passes into the cytoplasm, carrying the genetic message from DNA to the ribosomes, the sites of protein synthesis. In , we shall see how mRNA directly determines the sequence of amino acids during protein synthesis.

Translation is the second step of Protein Synthesis and it occurs in the:

I know protein synthesis usually occurs ..

Neurons are immensely complex cells whose morphology and physiology underpin our cognition. Achieving proper neuronal connections during development, as well as eliciting appropriate responses to environmental stimuli in the adult, requires precisely regulated protein synthesis. To meet these requirements, neurons have adapted regulatory mechanisms that act at every step in the process of producing functional proteins. Many of these mechanisms target messenger ribonucleic acid (mRNA)‐binding proteins and ribosomal subunits to regulate translational initiation. These mechanisms are especially concentrated at synapses, where they act to transform transient electrical signals into lasting functional modifications that are a basis for learning and memory. Misregulated synaptic protein synthesis contributes to several human cognitive changes including addiction, fragile X syndrome and autism.