Concept explainers
Interpretation:
The three different base triplets that could be combined to code for the given amino acids Leu-Leu-Leu has to be predicted.
Concept Introduction:
Codon: A sequence of three ribonucleotides in the mRNA chain that codes for a specific amino acid; also a three-
Genetic code: The sequence of nucleotides, coded in triplets (codons) in mRNA that determines the sequence of amino acids in protein synthesis.
Illustrated relationships are:
DNA informational strand: 5’ ATG CCA GTA GGC CAC TTG TCA 3’
DNA Template strand: 3’ TAC GGT CAT CCG GTG AAC AGT 5’
mRNA: 5’ AUG CCA GUA GGC CAC UUG UCA 3’
protein: Met Pro Val Gly His Leu Ser
Notice: 5’ end of the mRNA strand codes for the N-terminal amino acid, whereas the 3’ end of the mRNA strand codes for the C-terminal amino acid. Proteins are always written N-terminal to C-terminal, reading left to right.
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Modified Mastering Chemistry With Pearson Etext -- Standalone Access Card -- For Fundamentals Of General, Organic, And Biological Chemistry (8th Edition)
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- Assuming that each nucleotide is 0.34 nm long in mRNA, howmany triplet codes can simultaneously occupy space in a ribosomethat is 20 nm in diameter?arrow_forwardThe hypothetical mRNA sequence below contains the coding region for a short peptide. What consequence for this peptide does the substitution of the uracil at position 28 of the mRNA with guanine have? GGUUGAAUGGAACAACGCGUGCACCCUUAGAGGUAACCCUCC | G Group of answer choices No consequence, it is a silent mutation. It shortens the peptide by two amino acids. It destroys the start codon of the peptide coding region. It extends the peptide by two amino acid. It replaces one of the original amino acids of the protein with a different one.arrow_forwardWhat is the total size of the mature i.e. fully processed mRNA in nucleotides? How many amino acids would the encoded protein be? Assume that the N- terminal Met encoded by the AUG start codon, is NOT cleaved from the protein?arrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning