As a ribosome translocates along an mRNA molecule by one cod

As a ribosome translocates along an mRNA molecule by one codon, which of the following occurs? The tRNA that was in the A site moves into the P site. The tRNA that was in the P site moves into the A site. The tRNA that was in the P site moves to the E site and is released. The tRNA that was in the A site departs from the ribosome Both A and Care correct. During the process of translation a release factor ________. binds the terminator binds the operator binds a stop codon binds a start codon binds an intron 3 to 6. Indicate whether each of the following is transcribed and translated in a eukaryotic organism. Each question has only one answer; each choice can be used once, more than once, or not at all. Is transcribed and may be translated Is transcribed but is not translated Is not transcribed Transfer RNA genes Ribosomal RNA genes Introns Exons The following mRNA: 5\' AUGGUGCUGA AG 3\' encodes the polypeptide methionine-valine-leucine-lysine. A mutation in the gene that made this segment of mRNA replaces the seventh base, underlined above, in the mRNA. It now reads G instead of C. What polypeptide would the mutant mRNA encode? methionine-valine-valine-lysine methionine-methionine-leucine-lysine methionine-valine-leucine-lysine methionine-valine-leucine-leucine There is not enough information to answer the question.

Solution

As u want to know the answer only for 3-6.. So the answer is..

5) introns - they are transcribed because they are formed in RNA when comes from DNA but they are not translated as they contains no-coding sequence in them which are removed by splicing before formation of mature m-RNA.. Hence they need not be transcribed..

6) exons - transcribed and translated too.. They are transcribed from DNA and are translated to as they are part of the the m-RNA which contain the coding sequence for the protein..

3) transfer RNA & ribosomal RNA- they are transcribed and but not translated because they are formed from DNA by transcription but they don\'t require translation as they helps in undergoing translation process..!!