2. The active site residues in some proteins seem to be "ultimately conserved," meaningthat any change to that residue results in a complete lack of activity. Is it possible for thegene coding for that enzyme to evolve? Explain your answer.

2 evolutionary distant organisms, like a fungi and a human could still share a common gene between…

Answered: The active site residues in some…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Answer based on the question above: You have isolated a new eukaryotic microorganism and want to determine the genetic code of its mitochondria. Here are the amino acids encoded after translation of two synthetic mRNAs using mitochondrial extracts from your eukaryote- in this experiment translation can start at any sequence position: RNA: Protein: UAUAUAUAUAUAUAU--- Tyr-Met-Tyr-Met-Tyr-Met---- UAAUAAUAAUAAUAA--- Asn-Asn-Asn-Asn-Asn---- Met-Met-Met-Met-Met---- Based on the results shown here, what can you conclude about the codons in this eukaryote? AUA UAU UAA AAU A. Tyr Met Asn Met B. Met Tyr Asn Trp C. Tyr Met Asn Asn D. Met Tyr Asn, STOP or Met Asn, STOP or Met O O O B OA
Please answer completely both questions
Which statement is true for the active site residues of RNase A, lysozyme, or trypsin? Select any/all answers that apply. O A. His12 (RNase A) initially acts as an acid. O B. His119 (RNase A) initially acts as an acid. O C. Glu35 (lysozyme) initially acts as an acid. O D. His57 (trypsin) initially acts as an acid. O E. Ser195 (trypsin) initially acts as an acid.
Match each of the following examples with the hypothesis it argues against. Example The gene coding for keratin A gene coding for a tRNA Three genes, each coding for one of the G protein subunits (a, ß and y) A gene that undergoes alternative splicing Hypothesis One gene → one polypeptide One gene→→ one enzyme One gene → one protein One gene → one protein
Refer to the genetic code table and the mRNA sequence below to complete this question: U C U G A U G G G C U U U... beginning with the start codon, which amino acids, in order, are coded for by this section of mRNA? A) Thr-Met- Gly B) Met-Gly-Phe C) Ser-Asp-Gly-Leu .
in all cells observed to date, DNA serves as the stable, information-rivh molecule that stores genetic information. In contrast, in almost all cases, non-catalytic RNS serves as either a labile intermediate molecule involve in the production of proteins or as a labile regulatory molecule. A) based on the material, hypothesize why the molecule structures of DNA and RNA are, or are not, consistent with these two roles. B) RNA can also serve a catalytic role(ribosomes, RNA splicing, etc). What part of the RNA molecule would you predict makes it more likely than DNA to participate in enzymatic reactions? C) Explain how all these ideas may support as "RNA World Hypothesis" where RNA evolved first, followed by DNA and protein
For each of the following, identify whether that sequence or feature of a typical protein-coding gene would be recognizable in the specified molecule in a typical prokaryotic cell. 5' UTR in DNA? 5' UTR in mRNA? Shine-Dalgarno in DNA? Shine-Dalgarno in polypeptide? Promoter in RNA? Promoter in polypeptide sequence? Stop codon in mRNA? Stop codon in the polypeptide sequence? [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] > <

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The active site residues in some proteins seem to be "ultimately conserved," meaning that any change to that residue results in a complete lack of activity. Is it possible for the gene coding for that enzyme to evolve? Explain your answer.