Answer the questions below: The original DNA sequence is: DNA: TGC GTG CTT AAG CGG TGT ACA CGT TGC a. mRNA: b. Amino acid: Now decode the following mutated sequences: TGC GTG CTT AAG CGA TGT ACA CGT TGC c. mRNA: d. tRNA e. amino acids: f. What kind of mutation is this? g. Do you think it will affect the protein's function? Why?
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The corresponding mRNA sequence will be formed by replacing thymine (T) with uracil (U): ACG CAC GAA UUC GCC ACA UGU GCA ACG. Show more…
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Use your genetic code (codon) table to answer the next two questions: What type of mutation would result if the sequence of a gene were altered so that the sequence of the mRNA was changed from: AUGCCGUGCAGUAAC to AUGCCAUGCAGUAAC A) a nonsense mutation B) a frame-shift mutation C) a base insertion mutation D) a silent mutation E) a missense mutation
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In transcription, the mRNA transcribed from DNA is changed and matured. What is correct concerning the processing that takes place? a) A poly-A tail is put on the 3' end of the mRNA. b) A modified guanine cap is put on the 5' end. c) Spliceosomes cut out exons and splice the introns together. d) The mature mRNA is made only of exons.
Describe some ways in which DNA is altered to cause mutations. Consider the following segment in mRNA produced by the normal order of DNA nucleotides: - CAU UCU CGA GUU- - a. What is the amino acid order produced from this mRNA? b. What is the amino acid order if a mutation changes CUU to CCU? c. What is the amino acid order if a mutation changes CGA to UGA? d. What happens to protein synthesis if a mutation changes UCU to UGU? e. What happens if a G is added to the beginning of the mRNA segment? f. What happens if the $C$ is removed from the beginning of the mRNA segment?
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