A simplified model of protein synthesis is shown hereHow might this model be revised to show a more accurate depiction of protein synthesis? A to process 1DNA should copy itself to allow the cell to divide B After process 2, the completed protein should travel back to the nucleus Between processes 1 and 2, the mRNA must be modified before leaving the nucleus D During process 2the ribosome should remove any mutated nucleotides from the mRNA
To show a more accurate depiction of protein synthesis, the model could be revised as follows:
1. Include a step before process 1: Transcription. This step involves the copying of DNA to mRNA in the nucleus. This will accurately represent that the mRNA is synthesized from DNA before it leaves the nucleus.
2. Between processes 1 and 2, include a step called RNA Processing. This step involves modifications to the newly transcribed mRNA, such as the removal of introns (non-coding regions) and addition of a cap and a tail. This will represent the necessary modifications that mRNA undergoes before it can be translated into a protein.
3. Rename process 2 as Translation. This is the correct term for the step where the ribosome reads the mRNA and assembles amino acids into a polypeptide chain, ultimately forming the protein.
4. During Translation (process 2) include a step called Mutation Checking. This step represents the proofreading function of the ribosome, where it can detect and remove any mutated nucleotides in the mRNA to ensure accurate protein synthesis.
By including these revisions, the model will more accurately depict the steps involved in protein synthesis and highlight important processes such as transcription, RNA processing, translation, and mutation checking.