EBK CONCEPTS OF GENETICS
12th Edition
ISBN: 9780134818979
Author: Killian
Publisher: YUZU
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Chapter 13, Problem 11PDQ
Refer to Table 13.1. Can you hypothesize why a synthetic RNA composed of a mixture of poly U + poly A would not stimulate incorporation of 14C-phenylalanine into protein?
Table 13.1 Incorporation of 14C-Phenylalanine into Protein
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A series of tRNAs have the following anticodons. Consider the wobble rules listed in Table and give all possible codons with which each tRNA can pair.
Q. 5′ –IAA–3′
Consider a short peptide that forms an alpha-helix within a larger protein structure. Suppose that one glutamate residue at some specific position in the helix were mutated to a leucine residue. The mutation could either make the helix more stable, or less stable.
i) Describe two situations in which a Glu-to-Leu mutation could make the helix more stable.
ii) Describe two situations in which the Glu-to-Leu mutation could make the helix less stable.
Explain briefly the basis for the stabilizing and destabilizing effect in all cases.
You are studying COVID-19 which infects bat cells through an interaction between a lysine residue on a viral protein with an aspartic acid residue on the bat cell protein. You discover that when the virus made the jump into human cells, the virus mutated the lysine residue to leucine. Based on your knowledge of amino acid chemistry, which amino acid(s) will the leucine most likely interact with? Briefly explain your answer.
Chapter 13 Solutions
EBK CONCEPTS OF GENETICS
Ch. 13 - In a mixed heteropolymer experiment using...Ch. 13 - When repeating copolymers are used to form...Ch. 13 - The following represent deoxyribonucleotide...Ch. 13 - Prob. 1CSCh. 13 - A 30-year-old woman was undergoing therapy for...Ch. 13 - A 30-year-old woman was undergoing therapy for...Ch. 13 - HOW DO WE KNOW? In this chapter, we focused on the...Ch. 13 - CONCEPT QUESTION Review the Chapter Concepts list...Ch. 13 - Assuming the genetic code is a triplet, what...Ch. 13 - The mRNA formed from the repeating tetranucleotide...
Ch. 13 - In studies using repeating copolymers, AC ......Ch. 13 - In a coding experiment using repeating copolymers...Ch. 13 - Prob. 7PDQCh. 13 - When the amino acid sequences of insulin isolated...Ch. 13 - Prob. 9PDQCh. 13 - Why doesnt polynucleotide phosphorylase (Ochoas...Ch. 13 - Refer to Table 13.1. Can you hypothesize why a...Ch. 13 - Predict the amino acid sequence produced during...Ch. 13 - A short RNA molecule was isolated that...Ch. 13 - A glycine residue is in position 210 of the...Ch. 13 - Refer to Figure 13.7 to respond to the following:...Ch. 13 - Most proteins have more leucine than histidine...Ch. 13 - Define the process of transcription. Where does...Ch. 13 - Prob. 18PDQCh. 13 - Describe the structure of RNA polymerase in...Ch. 13 - Prob. 20PDQCh. 13 - Messenger RNA molecules are very difficult to...Ch. 13 - Present an overview of various forms of...Ch. 13 - One form of posttranscriptional modification of...Ch. 13 - Describe the role of two forms of RNA editing that...Ch. 13 - Substitution RNA editing is known to involve...Ch. 13 - Prob. 26ESPCh. 13 - Prob. 27ESPCh. 13 - Prob. 28ESPCh. 13 - Shown here are the amino acid sequences of the...Ch. 13 - The genetic code is degenerate. Amino acids are...Ch. 13 - M. Klemke et al. (2001) discovered an interesting...Ch. 13 - Recent observations indicate that alternative...Ch. 13 - Isoginkgetin is a cell-permeable chemical isolated...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- a) b) Shown below is a DNA sequence that encodes for a section of a protein. Please write the amino acid sequence using the three letter codes for this section. 5' ATG ACT CTC TCC TGG GGC ATC CGA TAA 3' What would the second codon be changed to if it was both a silent mutation and a transition mutation? Please write an anticodon in 5' to 3' direction that would recognize both the original second codon and the mutated second codon.arrow_forwardGiven the following diagram of how protein AWESOME1 binds to it's target DNA, describe the potential effects of each of the 5 mutations shown below. The wild-type sequence of a helix #1 is also shown in the blue box, and all the mutations are in helix #1 (see numbers for identifying particular residues). a helix #1 R(1)-V-I-L-Y-F-W-I-M-Y-F-S-H-Y-W-R(16) #1 Predict the consequence of the following mutations: 1) Arg(1) to Glu 2) Arg(1) to Ala 3) Phe(6) to lle 4) Trp(7) to Phe 5) Met(9) to Pro inarrow_forwardThe charging of a tRNA with an amino acid can be represented by the following equation:amino acid + tRNA + ATP → aminoacyl-tRNA + AMP + PPI where PPI is pyrophosphate (see figure 3–40). in the aminoacyl-tRNA, the amino acid and tRNA are linked with a high-energy covalent bond; a large portion of the energy derived from the hydrolysis of ATP is thus stored in this bond and is available to drive peptide bond formation at the later stages of protein synthesis. the free-energy change of the charging reaction shown in the equation is close to zero and therefore would not be expected to favor attachment of the amino acid to tRNA. Can you suggest a further step that could drive the reaction to completion?arrow_forward
- What RNA base sequence is complimentary to the following DNA base sequence 5'-CATGATTAT-3'? Using the table of codons, give the primary structure of the protein coded for by the RNA sequence: 5’-CCA CGA GGG GAG ACU UAA-3’?arrow_forwardDraw and label the following RNA tetranucleotide: 5’phosphoryl-A-2’O-methyl-C-U-G-3’-phosphatearrow_forwardThe tRNA anticodon sequence 3’GAG 5’ is charged with the amino acid leucine. This anticodon may pair with both 5’ CUC 3’ and 5’ CUU 3’. Which of the following is consistent with this phenomenon? 1. The information provided is not accurate since only the 5’ CUC 3’ codon can complementary base pair with the 3’ GAG 5’ anticodon 2. This feature allows for the genetic code to be degenerate 3. This feature allows for the genetic code to be overlapping 4. This feature is commonly associated with tautomeric shifts 5. This feature causes a change in the encoded amino acidarrow_forward
- TRUE OR FALSE a) The structure of the purines and pyrimidines make them able to undergo keto-enol tautomerism. b) A unique 5'CCA terminal sequence is found in all tRNAs to be able to carry the correct amino acid to the ribosome.arrow_forwardConsider the following DNA sequence, which codes for a short polypeptide: 5'-ATGGGCTTAGCGTAGGTTAGT-3' Determine the mRNA transcript of this sequence. You have to write these sequences from the 5' end to the 3' end and indicate those ends as shown in the original sequence in order to get the full mark. How many amino acids will make up this polypeptide? Determine the first four anticodons that will be used in order to translate this sequence.arrow_forwardThe genetic code was deciphered by experiments in which synthetic polyribonucleotides of known repeating sequences were used as mRNAs to direct protein synthesis in cell - free extracts . What type or types of polypeptides would you expect to be synthesized if poly (AAG) n (A) AAGAAGAAG ) used as the template for in vitro peptide synthesis ?arrow_forward
- Ornithine is structurally similar to lysine except ornithine’s side chain is one methylene group shorter than that of lysine. Attempts to chemically synthesize and isolate ornithinyl-tRNA proved unsuccessful. Propose a mechanistic explanation. (Hint: Six-membered rings are more stable than sevenmembered rings.)arrow_forwardConsider this list (below) of steps involved in translation. These steps are out of order. TRANSLATION: 1. the small and large ribosomal sub-units unite2. two amino acids join together.3. another tRNA anti-codon bonds with another mRNA codon 4. an initial tRNA bearing a specific amino acid arrives at the ribosome 5. the process continues until a protein molecule is completed6. at the synthesis site, initial mRNA codons are insertedarrow_forwardList all possible codons present in a ribonucleotide polymer containing U and G in random sequence. Which amino acids are encoded by this RNA?arrow_forward
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