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- The AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this? complementarity nonsense codons universality degeneracyWhich of the following statements is false? a. GTP is an energy source during various stages of translation. b. In the ribosome, peptidyl transferase catalyzes peptide bondformation between amino acids. c. When the mRNA code UAA reaches the ribosome, there isno tRNA to bind to it. d. A long polypeptide is cut off the tRNA in the A site so its Metamino acid links to the amino acid in the P site. e. Forty-two amino acids of a protein are encoded by 126nucleotides of the mRNA.1. A portion of an mRNA attached to a ribosome reads: 5′ GACAUGAACAGC 3′ If a tRNA with a methionine amino acid attached is in the P site of the ribosome, a tRNA with which amino acid attached will enter the A site? Group of answer choices a. Glutamic Acid b. Lysine c. Threonine d. Asparagine
- 1) Considering how readily RNA folds to form a secondary structure, why isn’t it used to store genetic information rather than double-stranded DNA? Cite multiple reasons. 2) Do miRNA and siRNA both derive from the same source? Explain.7. A segment of a DNA strand consists of ...GCTTAGACCTGA.... (a) Identify the expected nucleotide order in the complementary mRNA (b) Identify the sequence of amino acids coded for by this segment of DNA. (c) Describe the bond that forms during translation to link amino acids together. Identify the functional groups that react and the atoms involved.1. how is the initiation codon, identified by the ribosomes during translation in:1. prokaryotes and 2. eukaryotes 2. aminoacly-tRNA synthetase joins amino acids to their cognate tRNAs. Breifely describe the 2 reactions of aminoacylation.
- 1. Considering the following nucleotide sequence in an mRNA molecule: 5’ AUG UUA CGU AAU GCU GUC GAA UCU AUU UGC UUU ACA UAA 3' d) Write the amino acid sequence of the peptide synthesized from the given mRNA nucleotide sequence. e) Draw the structure of the pertide fragment made up of the first five (5) amino acids in the given polypeptide.1. Considering the following nucleotide sequence in an mRNA molecule: 5’ AUG UUA CGU AAU GCU GUC GAA UCU AUU UGC UUU ACA UAA 3' a) Write the sequence of the DNA template (antisense) strand from which the mRNA was synthesized. b) Write the sequence of the DNA coding (sense or informational) strand complementary to the template strand. c) Write the sequence of tRNA anticodon that corresponds to the given mRNA molecule. d) Write the amino acid sequence of the peptide synthesized from the given mRNA nucleotide sequence. e) Draw the structure of the pertide fragment made up of the first five (5) amino acids in the given polypeptide.1. The codon AUG on the mRNA codes for which amino acid (give the 3-letter abbreviation)? _______ The codon GGA would indicate which amino acid? _______ If a codon UAG is reached what does this indicate? _______
- 1. Assume that the ribosome has just catalyzed the formation of a peptide bond, but the ribosome has not yet translocated to the next codon. Is the polypeptide attached to the A-site tRNA or to the P-site tRNA?4. If a DNA triplet is CGA A. What is the mRNA codon? B. What is the tRNA anticondon? C. What amino acid does the mRNA code for? 5. If 18% of the nucleotide bases in a DNA molecule are Guanine (G) A. What % of the bases are cytosine (A)? B. What % of the bases are adenine (A) and thymine (T) combined? C. What % of the bases are thymine alone?1. A region of DNA in a particular cell synthesizes a segment of RNA that is 174 bases long and in the form of a large palindrome. The RNA is transported to the cytoplasm and folds into a hairpin loop of double stranded RNA. In the cytoplasm, the hairpin loop is recognized by a double-stranded RNA cutting enzyme (dicer) and is cut into 21 BP lengths. When these 21 BP double stranded segments are combined with protein, they function by: Answer choices destroying specific mRNAs priming the synthesis of DNA sequences adding DNA to the chromosome ends (telomeres) acting as decoys for RNA degrading enzymes thus protecting the mRNAs present splicing the introns out of messenger RNA 2. The following are genotypes of merozygotes of E. coli with various combinations of lac operon mutations. Determine the phenotype with respect to beta-galactosidase (z), permease (y), and trans-acetylase (a) of each combination as U = uninducible, I = inducible, and C = constitutive. Choose from…
