Lgh ndrome is a metabolic disorder that affects the cetral nervous system a mutation in the MT-ATP6 gene Figure I shows one of the mutations in the MT-ATP6 gene that can cause Leigh syndrome Table I contains some of the DNA codons that code for particular amino acids rks Table 1 Amino acid DNA codo Isoleucine ATT, ATC, ATA Glutamate GAA, GAG Figure I Original gene: CAACCAATAGCCCTGGCCGTA Mutated gene: CAACCAATAGCCCGGGCCGTA Leucine CTG, TTA, TTG Methionine ATG Valine GTT, GTC, GTA, GTG Arginine CGG, AGA Alanine GCT, GCC, GCA, GCG (a) Give one piece of evidence from Table 1 that shows the genetic code is degenerate. (b) (i) Describe the effect that the mutation shown in Figure 1 will have on the mRNA sequence produced from the MT-ATP6 gene. (ii) Using Table 1 for refere.ce, describe the effect that the mutation shown in Figure 1 will have on the primary structure of the nrotein produced from the MT-ATP6 gene.

Biochemistry
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Chapter1: Biochemistry: An Evolving Science
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Leigh omdrome
a metabolic disorder that affects the central nervous system
sed by a mutation in the MT-ATP6 gene
Figure I shows one of the mutations in the MT-ATP6 gene that can cause Leigh syndrome.
Table I contains some of the DNA codons that code for particular amino acids.
rks
Table 1
Amino acid
DNA codon
Isoleucine
ATT, ATC, ATA
Glutamate
GAA, GAG
Figure I
CTG, TTA, TTG
Original gene: CAACCAATAGCCCTGGCCGTA
Mutated gene: CAACCAATAGCCCGGGCCGTA
Leucine
ATG
Methionine
Valine
GTT, GTC, GTA, GTG
cs)
Arginine
CGG, AGA
Alanine
GCT, GCC, GCA, GCG
(a) Give one piece of evidence from Table 1 that shows the genetic code is degenerate.
(b) (i) Describe the effect that the mutation shown in Figure 1 will have on
the mRNA sequence produced from the MT-ATP6 gene.
(ii) Using Table 1 for refere.ce, describe the effect that the mutation shown in Figure 1 will have on the
primary structure of the nrotein produced from the MT-ATP6 gene.
.....
........
Transcribed Image Text:Leigh omdrome a metabolic disorder that affects the central nervous system sed by a mutation in the MT-ATP6 gene Figure I shows one of the mutations in the MT-ATP6 gene that can cause Leigh syndrome. Table I contains some of the DNA codons that code for particular amino acids. rks Table 1 Amino acid DNA codon Isoleucine ATT, ATC, ATA Glutamate GAA, GAG Figure I CTG, TTA, TTG Original gene: CAACCAATAGCCCTGGCCGTA Mutated gene: CAACCAATAGCCCGGGCCGTA Leucine ATG Methionine Valine GTT, GTC, GTA, GTG cs) Arginine CGG, AGA Alanine GCT, GCC, GCA, GCG (a) Give one piece of evidence from Table 1 that shows the genetic code is degenerate. (b) (i) Describe the effect that the mutation shown in Figure 1 will have on the mRNA sequence produced from the MT-ATP6 gene. (ii) Using Table 1 for refere.ce, describe the effect that the mutation shown in Figure 1 will have on the primary structure of the nrotein produced from the MT-ATP6 gene. ..... ........
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