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?
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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.A scientist introduces a mutation that makes the 60S ribosomal subunit nonfunctional in a human cell line. What would be the predicted effect on translation? Translation stalls after the initiation AUG codon is identified The ribosome cannot catalyze the formation of peptide bonds between the tRNAs in the A and P sites The ribosome cannot interact with mRNAs tRNAs cannot exit the E site of the ribosome.
- 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. Identify the name of the correct amino acid that corresponds to the correct tRNA codon and mRNA codon. State the process used to convert to mRNA and tRNA.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.
- : (2) (a) Using the codon table, show the consequences of adenine base addition to thebeginning of the following coding sequence on the subsequent translation. CGA-UCG-GAA-CCA-CGU-GAU-AAG-CAU asap7. 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. 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
- 3’ G G A U A C G U C A C C G G U A U A A G G U U U C G U A U C G 5’ If the RNA synthesized above is a functional mRNA and all the nucleotides belong to an exon, a. how many codons are present in this mRNA? b. how many codons actually code for a protein in this mRNA? c. what stop codon is present in this mRNA?1. Discuss the difference between intron and Exon1.List three different mRNA sequences that could encode the amino acid sequence histidyl-alanyl-arginyl-seryl-leucyl-valyl-cysteine.
