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Name: 43Some aminoacyl-tRNA molecules bind to more than one codon because th
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Description: 43Some aminoacyl-tRNA molecules bind to more than one codon because there is some play or wobble in the ____________ of the codon.A.first and third basesb.second basec.first baseD.third base44The regulatory promoter is located on the downstream of co

Science

Biology

aminoacyl-tRNA

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter13: Gene Expression

Section: Chapter Questions

Problem 12TYU

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76In positive regulation, an enhancer activates a promoter. Yesorno 77Mutant tRNA molecules can ________ mutations that create termination codons within a reading frame. A.transposeb.suppressc.activateD.translocate 78 ( ) permits a cell to recode genetic information in a systematic and regulated fashion.
67RNA interference was first discovered in Drosophila melanogaster. Yesorno 68Which of the following is required for the bacterial ribosome complex to disassemble?A.EF1A-GTPb.Signal sequencec.Release factorD.EF1B 69A transcription unit must have an initiation signal called a _____________ for accurate and efficient transcription to take place. A.transcription start siteb.promoterc.transcription initiation factorD.ori
73Dicer catalyzes Sequence-dependent single-stranded RNA cleavage. Yesorno 74Amino acid-coding regions within eukaryotic genes may be interrupted by ___________ regions. A.noncodingb.long terminal repeatc.split geneD.enhancer 75Which of the following cleaves the N-terminal methionine from polypeptides?A.Methionine isomeraseb.Methionine aminopeptidasec.Methionine carboxylaseD.Methionine transferase
At least one nonsense suppressing tRNA is knownthat can suppress more than one type of nonsensecodon.a. What is the anticodon of such a suppressing tRNA?b. What stop codons would it suppress?c. Could this tRNA possibly also function as a missense suppressor?d. What are the amino acids most likely to be carriedby this suppressing tRNA?
Label each true or false A.STTGATA3 is the consensus sequence of the -35 regulatory region of prokaryotic genes B. The chromosomes in the image to the right illustrate a reciprocal translocation: (picture) C. When histones are deacetylated, nucleosomes transcription is repressed.
88Sequential binding of RNA polymerase II-TFIIF complex, TFIIE, and TFIIH completes ___________________ formation. A.pre-initiation complexb.TF recognition elementc.pre-elongation complexD.TATA binding complex 89Which of the following is the GDP-GTP exchange protein?A.EF-Tub.none of the abovec.EF-TsD.EF-G 90RNA polymerase II has 14 subunits. Yesorno
What is the order of the tRNA binding sites on the 70S ribosome with respect to the 5'→ 3' direction of mRNA? O a. PAE ОБ.ЕРА OC. AEP O d. PEA O e. E AP Which of the following is TRUE regarding eukaryotic RNA processing? O a. Functional individual FRNA cannot be produced without splicing. O b. Splicing of the MRNA precursor is done in the cytoplasm, while modification of the ends is done in the nucleus. OC. An unprocessed mRNA precursor is translocated into the cytoplasm to be modified before the translation. O d. Splicing of the mRNA precursor is done in the nucleus, while modification of the ends is done in the cytoplasm. O e. Transcription yields primary transcript, which can by itself yield a functional protein. RNA self-splicing demonstrates the role of RNA as a(n): O a. spliceosome. O b. intron. O c. nucleophile. O d. exon. O e. catalyst.
Genetic expression involves transcription and translation. Match the structure or molecule to the step. a. promoter region b. RNA polymerase c. antisense strand d. poly-A tail е. 5 саp f. splicing g. anticodon loop h. acceptor stem i. peptide bond j. A site 57. transcribed strand that will go on to translation 58. site where tRNA with amino acid enters the ribosome 59. intron sequences are removed and exons are combined together 60. site where amino acid combines with tRNA
55__________________ assemble to form a spliceosome, the splicing machine that excises introns. A.snRNAb.tRNAc.Micro RNAD.rRNAs 56Eukaryotic initiator tRNA is charged with a formylated methionine. Yesorno 57Eukaryotic mRNA can be purified by separating molecules a mixture of total RNA by: A.Oligo (dG) cellulose chromatographyb.Oligo (dT) cellulose chromatographyc.Oligo (dC) cellulose chromatographyD.Oligo (dA) cellulose chromatography
Give one example of a prokaryotic system of gene expression that is more complicated (duringtranscription at the promoter) than its corresponding eukaryotic system of gene expression.A. prokaryotes require general transcription factors to initiate transcriptionB. prokaryotes typically have activator and repressor DNA sequences thousands of nucleotides awayC. prokaryotes have three classes of RNA polymerasesD. prokaryotes always have their DNA tightly packed into higher-level structures than nucleosomesE. prokaryotes usually have polycistronic mRNA
Post-transcriptional modifications in eukaryotic RNAS A. addition of CCA at the 5'end of the tRNA for binding with amino acids B. removal of introns and possibility of alternative splicing in joining different exons C. addition of guanyly residue from GTP to nascent mRNA at the 5' end D. Ten (10) Adenine nucleotides are added to the 3'end of the nascent MRNA E. some bases are modified in tRNA and rRNA A A, B, C, E only B, C, E only (c) A, B, C, D, E A, B, C, D only
Dystrophin gene structe 3 T Elijah's X G G Promoter Exon 19 Exon 52 Intron Exon 53 T G Liam's X affected T C СА Difference #3: (gln) Elijah's MRNA UAA (STOP) Liam's MRNA Q5: When DNA polymerase reaches the nucleotides encoding the premature stop codon it will... A. stop when it reaches the first nucleotide encoding the premature stop codon. B. stop when it reaches the last nucleotide encoding the premature stop codon. not be affected by this base change and will continue to read through the nucleotide difference. 26