questions on DNA molecules?

The base of sequence of a polynucleotide chain is given as follows. This is the template strand of a DNA molecule . Please answer the questions following the base sequence. Please indicate the ends of the base sequences of nucleic acids.

3' -TAC GGG CTA CAA CTT AAC AGA CCA ATC -5'

1) What will be the products if this DNA molecule is replicated?

2) What is the transcriptional result regarding this DNA molecule?

3)What is the amino acid sequence of the polypeptide chain that will be synthesized according to the mRNA molecule transcribed from this gene?

4)What are the anticodon sequences of the tRNA molecules that can carry these amino acids?

5) If this DNA got a mutation that changed the codon 5' - CTA -3' to 5' -TTA -3' ,what will happen to the polypeptide chain to be synthesized?

2 Answers

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  • 8 years ago
    Favorite Answer

    1) 3' -TAC GGG CTA CAA CTT AAC AGA CCA ATC -5'

    5'- ATG CCC GAT GTT GAA TTG TCT GGT TAG -3' <----Replicated strand

    2) 3' -TAC GGG CTA CAA CTT AAC AGA CCA ATC -5'

    5'-AUG CCC GAU GUU GAA UUG UCU GGU UAG -3' <---- Replicated RNA strand

    3) Met-Pro-Asp-Val-Glu-Leu-Ser-Gly

    4) 3' -UAC GGG CUA CAA CUU AAC AGA CCA AUC -5'

    5) 3' -TAC GGG CTA CAA CTT AAC AGA CCA ATC -5'

    changed to

    3' -TAC GGG CTA CAA CTT AAC AGA CCA ATT -5'

    mRNA: 5'-AUG CCC GAU GUU GAA UUG UCU GGU UAA -3'

    UAA and UGA are both stop codons so nothing will happen to the polypeptide chain

  • 3 years ago

    genetic guidance is saved using a code sequence of G,A,T,and C (short for guanine, adenine, thymine, cytosine) those molecules are used as a style of blueprint or a trend from which proteins are made. DNA basically codes for proteins. those proteins are to blame for making all of the different molecules on your physique, consisting of cellular organelles and potential molecules. 3 DNA bases code for a single AA (amino acid) in spite of the shown fact that dissimilar mixtures of bases can code for a similar AA. A protein molecule stated as a ribosome travels down a strand of DNA and reads it, translating each group of three bases into an amino acid. a set of amino acids, as quickly as executed, folds itself right into a complicated shape stated as a protein, which has a particular function in the physique.

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