Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 14, Problem 4TYU
Summary Introduction
Introduction:
During the process of gene expression, the premature RNA (ribonucleic acid) is converted into the matured form of RNA called mRNA (messenger ribonucleic acid), and the step is called as RNA splicing.
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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
Which one of the following options is NOT a step in RNA processing?
Addition of the 5’ G cap
Addition of the 3’ poly A tail
Splicing to remove exons and connect the retained introns
Splicing to remove introns and connect the retained exons
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.
Chapter 14 Solutions
Campbell Biology In Focus
Ch. 14.1 - MAKE CONNECTIONS In a research article about...Ch. 14.1 - What polypeptide product would you expect from a...Ch. 14.1 - DRAW IT The template strand of a gene contains the...Ch. 14.2 - What is a promoter? Is it located at the upstream...Ch. 14.2 - What enables RNA polymerase to start transcribing...Ch. 14.2 - WHAT IF? Suppose X-rays caused a sequence change...Ch. 14.3 - Given that there are about 20,000 human genes, how...Ch. 14.3 - How is RNA splicing similar to how you would watch...Ch. 14.3 - WHAT IF? What would be the effect of treating...Ch. 14.4 - What two processes ensure that the correct amino...
Ch. 14.4 - Discuss the ways in which rRNA structure likely...Ch. 14.4 - Describe how a polypeptide to be secreted is...Ch. 14.4 - WHAT IF? DRAW IT Draw a tRNA with the anticodon...Ch. 14.5 - What happens when one nucleotide pair is lost from...Ch. 14.5 - Prob. 2CCCh. 14.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 14 - In eukaryotic cells, transcription cannot begin...Ch. 14 - Prob. 2TYUCh. 14 - The anticodon of a particular tRNA molecule is A....Ch. 14 - Prob. 4TYUCh. 14 - Which component is not directly involved in...Ch. 14 - Prob. 6TYUCh. 14 - Prob. 7TYUCh. 14 - Prob. 8TYUCh. 14 - Fill in the following table: Type of RNA Functions...Ch. 14 - SCIENTIFIC INQUIRY Knowing that the genetic code...Ch. 14 - Prob. 11TYUCh. 14 - FOCUS ON INFORMATION Evolution accounts for the...Ch. 14 - SYNTHESIZE YOUR KNOWLEDGE Some mutations result in...
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- Which of the following is least likely following translation termination? The polypeptide is released. The mRNA is reused. The ribosome is reused. The polypeptide is immediately active.arrow_forwardDuring protein synthesis, which step does NOT require energy? dissociation of the 70S ribosome after translation termination delivery of aminoacyl-tRNAs to the ribosome translocation of the mRNA and tRNA within the ribosome formation of the peptide bond formation of aminoacyl-tRNASarrow_forwardWhich of the following step acts before the others in protein translation? Oribosome large subunits binds to mRNA O TRNA alignment with mRNA ribosome small subunits binds to mRNA amino acid chain elongationarrow_forward
- Eukaryotic 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_forwardThe following statements best describes the RNA structure EXCEPT it is usually single stranded there are three predominant forms for protein synthesis the repeating units are deoxyribonucleotides some eukaryotic RNAs stay in the nucleus to help in post transcriptional modificationarrow_forwardWhich of the following cannot be said regarding aminoacyl tRNA synthetase? It is essential for the correct reading of codons. A single tRNA synthetase can attach different amino acids to their corresponding tRNA. It is first activated when it catalyzes a reaction between ATP and an amino acid to form an aminoacyladenylic acid (amino acyl-AMP). It is responsible for the attachment of the correct amino acid to the correct tRNA. There is a different tRNA synthetase for each amino acid that will be attached to a tRNA.arrow_forward
- Which of the following statements about translation is false? In eukaryotes, the 5' cap and the 3' poly(A) tail are involved in translation initiation. Peptidyl-transferase activity during translation is the property of a ribozyme. A base at the first position of an anticodon on the tRNA would pair with a base at the third position of the mRNA. The growing peptide chain is transferred from the tRNA in the P site to the tRNA in the A site. Ribosomes move along an mRNA in the 3’ → 5' direction.arrow_forwardWhich of the following statements concerning translation is NOT correct? O b. O c. Polypeptide chain is extended from the C- terminus to the N-terminus. O d. The first codon of protein synthesis is AUG. Prokaryotic transcription and translation are coupled (i.e. they occur almost at the same time and at the same place). O e. Protein synthesis takes place in ribosome. During protein synthesis, the mRNA is read from 5' to 3' direction.arrow_forwardN Transfer RNAs (tRNAs) serve as adaptors between mRNA and amino acids during protein synthesis. Determining right and wrongarrow_forward
- Which of the following processing events occur during or after the synthesls of MRNA molecules in eukaryotes? Intron splicing Addition of a 5'cap O Cleavage of multiple functional molecules from a larger precursor O Polyadenylation of the 3' endarrow_forwardWhich of the following statements about the splicesome is correct? The spliceosome controls the translation process, ensuring that only exons are translated. O The spliceosome removes introns into mRNA sequences before translation. O The spliceosome inhibits transcription of noncoding DNA regions. The spliceosome contains both protein and a functional type of RNA known as SİRNAarrow_forwardWhich of the following is not directly involved in translation? mRNA RNA Polymerase Ribosomes tRNA Elongation Factorsarrow_forward
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