Concept explainers
To review:
The start codon and the amino acids sequences translated from mRNA sequence 5'- GGCGAUGGGCAAUAAACCGGGCCAGUAAGC-3'.
Introduction:
Codons are the three
Explanation of Solution
The start codon is the AUG acts as a signal codon, which helps in the initiation of translation. It is the first codon of messenger RNA. It is present in both eukaryotes and prokaryotes. In eukaryotes, it starts from 5'untranslated region. However, in prokaryotes it includes ribosomal binding sites.
The codon which is known as start codon is AUG, which codes for methionine. There are some codons which are known as stop codons, which terminate the translation of amino acids. The stop codons are UAA, UAG, and UGA. The amino acids, which will be obtained from given mRNA sequences are mentioned below:-
Therefore, it can be concluded that the codon which starts from 5th nucleotide is AUG. The amino acid sequences are Met, Gly, Asn, Lys, Pro, Gly, Gln, and STOP.
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Chapter 13 Solutions
Genetics
- If the genetic code uses triplets, how many different amino acids can be coded by a repeating RNA polymer composed of UA and UC (UAUCUAUCUAUC ...)? a. one b. two c. three d. four e. fivearrow_forwardThe genetic code is defined as a series of _______________ in _______________. (a) anticodons; tRNA (b) codons; DNA (c) anticodons; mRNA (d) codons; mRNA (e) codons and anticodons; rRNAarrow_forwardIdentify the features of tRNA that are important in decoding genetic information and converting it into protein language.arrow_forward
- Portions of eukaryotic mRNA sequence that are removed during RNA processing are . a. exons b. caps c. poly-A tails d. intronsarrow_forwardGiven 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?arrow_forwardBriefly describe the function of the following in protein synthesis. a. rRNA b. tRNA c. mRNAarrow_forward
- Which of the following is/are not found in a bacterial mRNA molecule? (a) stop codon (b) upstream leader sequences (c) downstream trailing sequences (d) start codon (e) promoter sequencesarrow_forwardGiven 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:arrow_forwardWhich of the following is/are typically removed from pre-mRNA during nuclear processing in eukaryotes? (a) upstream leader sequences (b) poly-A tail (c) introns (d) exons (e) all the precedingarrow_forward
- In the gene-coding sequence shown here, which of the following events will produce a frameshift after the last mutational site? a. insertion of an A after the first codon b. deletion of the second codon (AAA) c. insertion of TA after the second codon and deletion of CG in the fourth codon d. deletion of AC in the third codonarrow_forwardAn mRNA has the following sequence: 5' ACCAUGUACUGUCCUGCUGUUUGA 3'. Beginning from the start codon, what is the third amino acid of the translated polypeptide?arrow_forwardGiven the following mRNA sequence: 5-AUCCCGUAUGCCCGGGAGCUAGCCCAGC-3 a) Label the first condon, the stop codon, the untranslated regions and predict the amino acid sequence of the polypeptidarrow_forward
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