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Given the codon UCA in the first exon of a gene, which change is most likely to result in a nonsense mutation? A transversion of A to U Change of nucleotide in the third position Change of nucleotide in the first position A transition of A to G Change of nucleotide in the second position

Given the codon UCA in the first exon of a gene, which change is most likely to result in a nonsense mutation? A transversion of A to U Change of nucleotide in the third position Change of nucleotide in the first position A transition of A to G Change of nucleotide in the second position

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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### Genetic Code and Codon Table The table below represents the genetic code chart, which translates mRNA codons into amino acids. Each cell in the table shows a codon (a sequence of three nucleotides) and the corresponding amino acid or instruction (e.g., start or stop codons). #### How to Read the Codon Table 1. **First Letter**: Located on the left side of the table. 2. **Second Letter**: Located on the top of the table. 3. **Third Letter**: Located on the right side of the table. For example, the codon AUG corresponds to Methionine and also serves as the start codon. #### Codon to Amino Acid Mapping - **First Row (First Letter U)** - UUU, UUC: Phenylalanine - UUA, UUG: Leucine - UCU, UCC, UCA, UCG: Serine - UAU, UAC: Tyrosine - UAA, UAG: Stop codon - UGU, UGC: Cysteine - UGA: Stop codon - UGG: Tryptophan - **Second Row (First Letter C)** - CUU, CUC, CUA, CUG: Leucine - CCU, CCC, CCA, CCG: Proline - CAU, CAC: Histidine - CAA, CAG: Glutamine - CGU, CGC, CGA, CGG: Arginine - **Third Row (First Letter A)** - AUU, AUC, AUA: Isoleucine - AUG: Methionine; start codon - ACU, ACC, ACA, ACG: Threonine - AAU, AAC: Asparagine - AAA, AAG: Lysine - AGU, AGC: Serine - AGA, AGG: Arginine - **Fourth Row (First Letter G)** - GUU, GUC, GUA, GUG: Valine - GCU, GCC, GCA, GCG: Alanine - GAU, GAC: Aspartic acid - GAA, GAG
Transcribed Image Text:### Genetic Code and Codon Table The table below represents the genetic code chart, which translates mRNA codons into amino acids. Each cell in the table shows a codon (a sequence of three nucleotides) and the corresponding amino acid or instruction (e.g., start or stop codons). #### How to Read the Codon Table 1. **First Letter**: Located on the left side of the table. 2. **Second Letter**: Located on the top of the table. 3. **Third Letter**: Located on the right side of the table. For example, the codon AUG corresponds to Methionine and also serves as the start codon. #### Codon to Amino Acid Mapping - **First Row (First Letter U)** - UUU, UUC: Phenylalanine - UUA, UUG: Leucine - UCU, UCC, UCA, UCG: Serine - UAU, UAC: Tyrosine - UAA, UAG: Stop codon - UGU, UGC: Cysteine - UGA: Stop codon - UGG: Tryptophan - **Second Row (First Letter C)** - CUU, CUC, CUA, CUG: Leucine - CCU, CCC, CCA, CCG: Proline - CAU, CAC: Histidine - CAA, CAG: Glutamine - CGU, CGC, CGA, CGG: Arginine - **Third Row (First Letter A)** - AUU, AUC, AUA: Isoleucine - AUG: Methionine; start codon - ACU, ACC, ACA, ACG: Threonine - AAU, AAC: Asparagine - AAA, AAG: Lysine - AGU, AGC: Serine - AGA, AGG: Arginine - **Fourth Row (First Letter G)** - GUU, GUC, GUA, GUG: Valine - GCU, GCC, GCA, GCG: Alanine - GAU, GAC: Aspartic acid - GAA, GAG
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