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- Group I and II introns are present in the following classes of RNAS. MRNAS O MIRNAS SİRNAS TRNASMatch the regulatory RNA to each of the following descriptions. Regulatory RNA that prevents transcription by recruiting DNMT enzymes Regulatory RNA that prevents translation by acting either in cis- or trans- but not by binding RISC Regulatory RNA found only in eukaryotes that is not perfectly complementary to the target RNA [Choose ] [Choose ] [Choose ] antisense RNA siRNA IncRNA miRNA riboswitch <Which of the following is not true? There are two major classes of aminoacyl-tRNA synthetases The selectivity of the aminoacyl-tRNA synthetases for their tRNA molecules is often called the second genetic code A single activating enzyme can interact with all the tRNAs for its corresponding amino acid aminoacyl-tRNA synthetases link amino acids to tRNA molecules without the need for an energy source
- Label the following regions on this tRNA molecule, stating the function of each:RNA polymerase in Escherichia coli normally synthesizes all of the following molecules except: RNA primers during DNA replication messenger RNA (mRNA) transfer RNA (tRNA) ribosomal RNA (rRNA) heterogenous nuclear RNA (hnRNA)What would happen if you changed the anticodon in the Tryptophan tRNA from ACC to AAC? First letter U C A G U UUU Phe UUC Phe UUA Leu UUG Leu CỰU Leu CUC Leu CUA Leu CUG Leu AUU lle AUC lle AUA lle AUG Met GUU Val GUC Val GUA Val GUG Val Second letter C A UCU Ser UCC Ser UCA Ser UCG Ser CCU Pro CCC Pro CCA Pro CCG Pro ACU Thr ACC Thr ACA Thr ACG Thr GCU Ala GCC Ala GCA Ala GCG Ala UAU Tyr UAC Tyr UAA Stop UAG Stop CAU His CAC His CAA Gln CAG Gln AAU Asn AAC Asn AAA Lys AAG Lys GAU Asp GAC Asp GAA Glu GAG Glu G UGU Cys UGC Cys UGA Stop UGG Trp CGU Arg CGC Arg CGA Arg CGG Arg AGU Ser AGC Ser AGA Arg AGG Arg GGU Gly GGC Gly GGA Gly GGG Gly O Tryptophan would be incorporated into peptides where leucine normally goes Tryptophan would be incorporated into peptides where it normally goes ○ Leucine would be incorporated into peptides where Tryptophan normally goes O Histidine would be incorporated into peptides where Leucine normally goes U C A G U C A G U C A G U C A G Third letter
- The following is a portion of a protein: met-trp-tyr-arg-gly-pro-thr-Various mutant forms of this protein have been recovered. Using the normal and mutant sequences, determine the DNA and mRNA sequences that code for this portion of the protein, and explain each of the mutations. a. met-trp- b. met-cys-ile-val-val-leu-gln- c. met-trp-tyr-arg-ser-pro-thr- d. met-trp-tyr-arg-gly-ala-val-ile-ser-pro-thr-Given the following tRNA anticodon sequence, derive the mRNA and the DNA template strand. Also, write out the amino acid sequence of the protein encoded by this message. tRNA: UAC UCU CGA GGC mRNA: protein: How many hydrogen bonds would be present in the DNA segment?Given the following mRNA, write the double-stranded DNA segment that served as the template. Indicate both the 5 and the 3 ends of both DNA strands. Also write out the tRNA anticodons and the amino acid sequence of the protein encoded by the mRNA message. DNA: mRNA: 5-CCGCAUGUUCAGUGGGCGUAAACACUGA-3 protein: tRNA:
- TRNA also undergoes post transcriptional modifications. True FalseIn this chapter you were introduced to nonsense suppressor mutations in tRNA genes. However, suppressormutations also occur in protein-coding genes. Using thetertiary structure of the β subunit of hemoglobin shownin Figure 9-3(c), explain in structural terms how a mutation could cause the loss of globin protein function. Nowexplain how a mutation at a second site in the same protein could suppress this mutation and lead to a normalor near-normal protein.Match each of the following descriptions to the type of regulatory RNA affecting a "target" gene (aka, the gene the regulatory RNA is regulating). Use each answer once. This regulatory RNA may increase siRNA transcription of the target gene by recruiting activator proteins. secondary structures on RNA can become... IncRNA these regulatory RNAs regulate gene miRNA expression post transcriptionally generally by binding to the 3'-UTR regions of their target RNAs > >