Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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If there is a mutation in a section of DNA which corresponds to an intron, would that affect the primary structure of a protein or the protein's function or the organism's characteristics?
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The genes are segments of DNA that contain hereditary information. Some part of this gene is converted into functional product and other parts of the genes are not. These segments in a gene that codes the protein are known as exon and the non-coded proteins are known as introns.
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- One remarkable feature of the genetic code is that amino acids with similar chemical properties often have similar codons. thus codons with U or C as the second nucleotide tend to specify hydrophobic amino acids. Can you suggest a possible explanation for this phenomenon in terms of the early evolution of the protein-synthesis machinery?arrow_forwardWhen the ribosome "reads" the codon UAG, UGA or UAA... A) the polypeptide is released from ribosome but ribosome continues reading the mRNA B) the proper tRNA enters the ribosome C) translation begins D) polypeptide is released from the ribosome and translation endsarrow_forwardXeroderma pimentos is an inherited disorder characterized by rapid formation of many skin sores that develop into cancers. All forms of radiation trigger these symptoms, including fluorescent light, which contains UV light in the range of 320 to 400 nm. In most affected individuals, at least one of nine particular proteins is missing or defective. What is the collective function of these proteins?arrow_forward
- Codons are a three-letter genetic code that encode for specific amino acids. Which amino acid is at the beginning of every eukaryotic protein and why?arrow_forward3)Which of the following statements are true? Choose all that apply a)There are multiple codons possible for nearly all amino acids b)Each stop codon also codes for an amino acid c)Each tRNA will base pair with only one codon d)The start codon also codes for an amino acid e)Each codon in mRNA codes for exactly one amino acid f)Each codon in tRNA codes for exactly one amino acid g)Each anticodon in tRNA pairs with exactly one codon h)Each tRNA carries exactly one type of amino acidarrow_forwardDetermine the effect of the following mutations on the DNA sequence. In each case, the mutation is described after the sequence. Guanine nucleotide (G shown in red in the DNA sequence below) was substituted by C Write out the sequence of the mutated DNA and the protein made from it. What is the effect of this mutation on the protein? (For example, how will the mutation affect the length and sequence of the protein? What about the function of the protein?)arrow_forward
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