Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 10.3, Problem 1TYK
The splicing of pre-mRNA in eukaryotes involves the
- removal of exons and the connection of introns.
- removal of introns and the connection of exons.
- removal of introns only at the 3’ end.
- removal of introns only at the 5’ end.
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A segment of mRNA produced by the normal order of DNA nucleotides and the corresponding amino acid chain are given below:
mRNA segment: GCC UAC AAU GCG
Amino acid chain: Ala-Tyr-Asn-Ala
Knowing that insertion mutations shift the triplets by one base, if an insertion mutation adds a U to the beginning of that mRNA segment, what will be the new triplet/codon grouping and the new amino acid chain?
Group of answer choices
a. U GCC UAC AAU GCG; Ala-Tyr-Asn-Ala
b. UCC UAC AAU GCG; Ser-Leu-Gln-Cys
c. UGC CUA CAA UGC G; Cys-Leu-Gln-Cys
d. UGC CUA CAA UGC G; Ala-Tyr-Asn-Ala
e. UGCC UAC AAU GCG; Cys-Tyr-Asn-Ala
Which of the following is true of the timing of RNA processing?
The premise is false; mRNA processing does not occur in eukaryotes
mRNA processing occurs in the cytosol after pre-mRNA is exported from the nucleus
mRNA processing occurs co-transcriptionally
mRNA processing occurs in the nucleus after transcription has terminated
Introns are intervening sequences; what are exons?
Chapter 10 Solutions
Principles of Biology
Ch. 10.1 - What is the direction of flow of genetic...Ch. 10.1 - Prob. 1TYKCh. 10.1 - Prob. 2TYKCh. 10.1 - Prob. 3TYKCh. 10.2 - How would removing a terminator from a gene affect...Ch. 10.2 - Prob. 1BCCh. 10.2 - Prob. 1TYKCh. 10.2 - Prob. 2TYKCh. 10.3 - Do the ends of protein-encoding genes have a poly...Ch. 10.3 - The splicing of pre-mRNA in eukaryotes involves...
Ch. 10.3 - Prob. 2TYKCh. 10.4 - Prob. 1CCCh. 10.4 - Prob. 2CCCh. 10.4 - Prob. 1TYKCh. 10.4 - Prob. 2TYKCh. 10.5 - Prob. 1CCCh. 10.5 - Prob. 1BCCh. 10.5 - Based on the gene sequences shown here, pick two...Ch. 10.5 - Prob. 1TYKCh. 10.5 - Prob. 2TYKCh. 10.5 - Prob. 3TYKCh. 10.6 - Prob. 1CCCh. 10.6 - Prob. 1TYKCh. 10.6 - Prob. 2TYKCh. 10 - Which of the following best represents the central...Ch. 10 - Prob. 2TYCh. 10 - Prob. 3TYCh. 10 - Prob. 4TYCh. 10 - Prob. 5TYCh. 10 - Prob. 6TYCh. 10 - The legion of a tRNA that is complementary to a...Ch. 10 - Prob. 8TYCh. 10 - Prob. 9TYCh. 10 - Prob. 10TYCh. 10 - Lets suppose a gene mutation changed the sixth...Ch. 10 - What is the function of an aminoacyl-tRNA...Ch. 10 - A principle of biology is that the genetic...Ch. 10 - Prob. 1CBQCh. 10 - Prob. 2CBQ
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- The 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_forwardPortions of eukaryotic mRNA sequence that are removed during RNA processing are . a. exons b. caps c. poly-A tails d. intronsarrow_forwardWhich of the following is observed in prokaryotes but not in eukaryotes? O In prokaryotes, ribosomes move along an mRNA in the 3' to 5' direction. An MRNA can be translated by only one ribosome at a time in eukaryotes. Translation does not require any protein factors in prokaryotes. TCC is an example of a stop codon only found in prokaryotic mRNA. An MRNA can be translated by only one ribosome at a time in prokaryotes. The 5' end of a prokaryotic MRNA can be translated while the 3' end is still being transcribed.arrow_forward
- A codon is: three amino acids on a polypetide that are snipped off by the helicase enzyme sets of nucleotides on the tRNA, opposite the anti-codon sequence an mRNA component that specifies a specific amino acid that which attaches to the mRNA triplet sequence a don that goes with another don the protein that begins transcription by breaking H bondsarrow_forwardIndicate which of the following items are associated with transcription or translation. This could be in prokaryotes or eukaryotes, or both. Group of answer choices: Translation OR Transcription Sigma binds to the promoter mRNA binds to the small ribosomal subunit Spliceosomes remove introns and splice together exons Nucleotides are added from the 5' to 3' end tRNA anticodon binds to the corresponding mRNA codon STOP codon results in terminationarrow_forwardWhich of the following types of mutation that changes the mRNA sequence after the codon that initiates translation is likely to have the most detrimental effect on the polypeptide product? Group of answer choices a substitution of the first nucleotide of a GGG codon a substitution of the third nucleotide in an ACC codon an insertion of a codon a deletion of two nucleotides a deletion of a codonarrow_forward
- Which of the following is NOT an event associated with translation termination? A stop codon enters the A site on the ribosome. A Release Factor enters the A site A terminal amino acid is added to the polypeptide to signal the end of translation. Release Factor mediates the hydrolysis of the polypeptide from the tRNA at the P site. The polypeptide and tRNA are released and the ribosomal subunits are separated.arrow_forwardIn the process of translation, the input is and the output is O TRNA, mRNA MRNA, protein O DNA, MRNA O MRNA, DNA O ERNA, proteinarrow_forwardWhich of the following is observed in prokaryotes but not in eukaryotes? An mRNA can be translated by only one ribosome at a time in prokaryotes. The 5´ end of a prokaryotic mRNA can be translated while the 3´ end is still being transcribed In prokaryotes, ribosomes move along an mRNA in the 3´ to 5´ direction. UGG is an example of a stop codon only found in prokaryotes.arrow_forward
- The 3' end of eukaryotic pre-mRNAS are changed by: O phosphorylation of the mRNA molecule, copying the last few bases so that it can form a duplex structure. removing the last phosphate group. O adding a "cap." adding 100-250 adenine nucleotides.arrow_forwardWhich would have the most serious effect on polypeptide product?arrow_forwardEukaryotic messenger RNA can undergo post synthetic processing after transcription and before translation. One of the processing steps is splicing, where portions of the RNA are removed and the remaining RNA are joined together. Classify the statements regarding mRNA splicing as true or false. True statements False statements In splicing, intron sequences are removed from the mRNA in the form of lariats (loops) and are degraded. Splicing occurs while the mRNA is still in the nucleus. Splicing of mRNA does not involve any proteins. One MRNA can sometimes code for more than one protein by splicing at alternative sites. Splicing occurs while the mRNA is attached to the nucleosome.arrow_forward
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