16. Below is a region of DNA (sense strand) showing the base sequence T A T G T

Question

16. Below is a region of DNA (sense strand) showing the base sequence T A T G T G T G C A A T a. Give the base sequence for mRNA transcribed from the DNA; assume no introns. b. Give the amino acid sequence coded for by the bases. Use the legend below. c. A mutation occurs which inserts a cytosine at the beginning of the DNA sequence. Give the new mRNA sequence and the amino acid sequence for which it codes. legend: CAC= histidine GUU= valine GCA= alanine legend:ACG= threonine CAU= histidine AUA= isoleucine legend:UUA= leucine ACA= threonine CGU= arginine
legend:GAU= aspartic acid
16. Below is a region of DNA (sense strand) showing the base sequence T A T G T G T G C A A T a. Give the base sequence for mRNA transcribed from the DNA; assume no introns. b. Give the amino acid sequence coded for by the bases. Use the legend below. c. A mutation occurs which inserts a cytosine at the beginning of the DNA sequence. Give the new mRNA sequence and the amino acid sequence for which it codes. legend: CAC= histidine GUU= valine GCA= alanine legend:ACG= threonine CAU= histidine AUA= isoleucine legend:UUA= leucine ACA= threonine CGU= arginine
legend:GAU= aspartic acid
16. Below is a region of DNA (sense strand) showing the base sequence T A T G T G T G C A A T a. Give the base sequence for mRNA transcribed from the DNA; assume no introns. b. Give the amino acid sequence coded for by the bases. Use the legend below. c. A mutation occurs which inserts a cytosine at the beginning of the DNA sequence. Give the new mRNA sequence and the amino acid sequence for which it codes. legend: CAC= histidine GUU= valine GCA= alanine legend:ACG= threonine CAU= histidine AUA= isoleucine legend:UUA= leucine ACA= threonine CGU= arginine
legend:GAU= aspartic acid legend:GAU= aspartic acid

Explanation / Answer

DNA

TATGTGTGCAAT

RNA sequence

UAUGUGUGCAAU

Amino acid (one letter)

YVCN

Amino acid SEQUENCE

Tyr – Val- Cys- Asn

Y

Tyrosine

Tyr

C

Cysteine

Cys

V

Valine

Val

N

Asparagine

Asn

A mutation occurs which inserts a cytosine at the beginning of the DNA sequenc

Cytosine

Cys- – Val- Cys- Asn

DNA

TATGTGTGCAAT

RNA sequence

UAUGUGUGCAAU

Amino acid (one letter)

YVCN

Amino acid SEQUENCE

Tyr – Val- Cys- Asn

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