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The last step in protein synthesis is termination, where the ribosome reaches a stop codon on the mRNA. This signals the release of the newly synthesized polypeptide chain from the ribosome. Subsequently, the ribosomal subunits and mRNA are also released, allowing the components to be recycled for future rounds of protein synthesis.
What else can I help you with?
What would happen if the very last stop codon of a mRNA molecule was mutated into a regular codon?
That isn't exactly a mutation; it's more like degradation. It would basically mean that mRNA, which is made up of multiple codons, will deteriorate into a codon, which is only 3 nucleic acids combined together. Such corrosion would probably result in the cell breaking the codon like how it normally does mRNA, or it will be absorbed into the nucleus to be combined to form a normal mRNA.
Does mRna contain the code for the sequence of amino acids needed to manufacture a protein?
Yes it does, and more. Ahead of, or in front of, the protein coding sequence we find the multi-purpose Leader Sequence[s]. They provide the 'addresses' for the locations where the Proteins are [pre-] destined to reside.Now, the Cell has many Levels, and specific Proteins need to be assigned or Destined to specific Levels. This is what was meant by 'multi-purpose leader sequences': When a Protein arrives at Level One - if it is meant to be there the Leader Sequence is removed and the Protein takes up residence. Otherwise, just a portion of the Leader Sequence is removed, then the rest moves on to the next Level and the similar Process again occurs.Eventually the last remaining piece of the Leader Sequence directs the Outermost Destined Protein to the Outermost Layer of the Cell, the Cell membrane, where it takes up useful residence.
How many earthquake are occur in the last four years?
alot of earthquakes
How often do tides occur?
during the first and last quarter of the moons gravitational
When does the tomatina occur?
The Tomatina festival occurs on the last Wednesday of August each year in the town of Buñol, Spain.
What is the last stage in protein synthesis which amino acids are assembled by tRNA?
translation
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
What meaning do the first and last codons have for protein synthesis?
Codons are used for making amino acids. Some codons will tell the ribosomes to start tell the tRNA to make the amino acids or to stop making amino acids. I like to think of the start/initiator/promoter codon(AUG) as a capital letter in a sentence and the stop/terminator codons(UAA, UAG, and UGA) as periods in a sentence.
What are the steps of protein synthesis in a cell?
Protein Synthesis Steps in Protein Synthesis: STEP 1: The first step in protein synthesis is the transcription of mRNA from a DNA gene in the nucleus. At some other prior time, the various other types of RNA have been synthesized using the appropriate DNA. The RNAs migrate from the nucleus into the cytoplasm. Prior to the beginning of the protein synthesis, all of the component parts are assembled in the ribosome which is the brown/tan structure in the left graphic. 30S Subunit Ribosome - graphic30S Subunit Ribosome - Chime in new window See Link for an overall diagram. STEP 2: Initiation: In the cytoplasm, protein synthesis is actually initiated by the AUG codon on mRNA. The AUG codon signals both the interaction of the ribosome with m-RNA and also the tRNA with the anticodons (UAC). The tRNA which initiates the protein synthesis has N-formyl-methionine attached. The formyl group is really formic acid converted to an amide using the -NH2 group on methionine (left most graphic) The next step is for a second tRNA to approach the mRNA (codon - CCG). This is the code for proline. The anticodon of the proline tRNA which reads this is GGC. The final process is to start growing peptide chain by having amine of proline to bond to the carboxyl acid group of methinone (met) in order to elongate the peptide. Quiz: The next codon is UAU. What is the next amino acid to be added? AnswerUAU = tyrosine The other graphic on the left shows this process at the molecular level.Click for larger imageSTEP 3: Elongation: Elongation of the peptide begins as various tRNA's read the next codon. In the example on the left the next tRNA to read the mRNA is tyrosine. When the correct match with the anticodons of a tRNA has been found, the tyrosine forms a peptide bond with the growing peptide chain . The proline is now hydrolyzed from the tRNA. The proline tRNA now moves away from the ribosome and back into the cytoplasm to reattach another proline amino acid. Quiz: The next codon is GCU. What is the next amino acid to be added?Genetic Code AnswerGCU = alanine What is the anticodon on this next tRNA? Answeranticodon = CGA What does the code, UAA, on m-RNA say to do? AnswerUAA is the stop signal.Click for larger imageStep 4: Elongation and Termination: When the stop signal on mRNA is reached, the protein synthesis is terminated. The last amino acid is hydrolyzed from its t-RNA. The peptide chain leaves the ribosome. The N-formyl-methionine that was used to initiate the protein synthesis is also hydrolyzed from the completed peptide at this time. The ribosome is now ready to repeat the synthesis several more times. Link to an aminimated movie on protein synthesis. Link to: Great Animation of entire Protein Synthesis - John KyrkLink to: Boyere Tutorial Animations - Protein Synthesis - complete Link to most thorough animation - Protein Synthesis - Brooks-Cole
What substance is the body capable of catabolishing as a source of energy but would be the last utilized for this purpose?
The body is capable of using protein as a source of energy, but it would be the last source the body uses when it is in a malnourished state.
The last stage of cellular respiration is called the?
Electron Transport SystemThe electron transport chain
What is the second step of protein synthesis?
Initiation:In the cytoplasm, protein synthesis is actually initiated by the AUG codon on mRNA. The AUG codon signals both the interaction of the ribosome with m-RNA and also the tRNA with the anticodons (UAC). The tRNA which initiates the protein synthesis has N-formyl-methionine attached. The formyl group is really formic acid converted to an amide using the -NH2 group on methionine (left most graphic)The next step is for a second tRNA to approach the mRNA (codon - CCG). This is the code for proline. The anticodon of the proline tRNA which reads this is GGC. The final process is to start growing peptide chain by having amine of proline to bond to the carboxyl acid group of methinone (met) in order to elongate the peptide.
Which hurricane was last to occur?
The last hurricane was named Tomas.
If Can an ectopic pregnancy occur in two weeks pregnant If so how long would it last or what would happen?
If you have an ectopic it's a ectopic from the start so yes.
Did the Bill of Rights occur last?
yes it did
The last part of the Stone Age?
the last part of the Stone age occur
When did the 2nd last tornado occur?
As of October 9, 2010 the last tornadoes to occur were in a small outbreak of 7 tornadoes in Arizona on October 6.
