BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 15, Problem 18RQ
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.
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How does the antibiotic streptomycin inhibit bacterial translation?
Multiple Choice
blocks elongation by preventing the large ribosomal subunit from binding to the small ribosomal subunit
interferes with the normal pairing of aminoacyl TRNAS and codons resulting in abnormal proteins
prevents the release of the initiator tRNA from the P site, blocking elongation
blocks termination by competitively inhibiting the binding of a release factor to the A site
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.
Drag the functions involved in the bacterial translation process into the appropriate box with the corresponding name of the translation factor or component.
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Prevents premature association of the
large ribosomal subunit with the small
Serves as the MRNA binding site for
Guides the initiator fMet-tRNA into the
the small ribosomal subunit.
P site.
ribosomal subunit.
Prevents entry of an amino-acyl tRNA
into the ribosome A site during the
early initiation stages.
Assists incoming amino-acyl RNA into
the A site.
IF1
IF2
IF3
EF-Tu
Shine-Dalgarno
sequence
Chapter 15 Solutions
BIOLOGY 2E
Ch. 15 - Figure 15.11 A scientist splices a eukaryotic...Ch. 15 - Figure 15.13 Errors in splicing are implicated in...Ch. 15 - Figure 15.16 Many antibiotics inhibit bacterial...Ch. 15 - The AUC and AUA codons in mRNA both specify...Ch. 15 - How many nucleotides are in 12 mRNA codons? 12 24...Ch. 15 - Which event contradicts the central dogma of...Ch. 15 - Which subunit of the E. coli polymerase confers...Ch. 15 - The -10 and -35 regions of prokaryotic promoters...Ch. 15 - Three different bacteria species have the...Ch. 15 - Which feature of promoters can be found in both...
Ch. 15 - What transcripts will be most affected by low...Ch. 15 - How do enhancers and promoters differ? Enhancers...Ch. 15 - Which pre-mRNA processing step is important for...Ch. 15 - What processing step enhances the stability of...Ch. 15 - A scientist identifies a pre-mRNA with the...Ch. 15 - The RNA components of ribosomes are synthesized in...Ch. 15 - In any given species, there are at least how many...Ch. 15 - A scientist introduces a mutation that makes the...Ch. 15 - Imagine if there were 200 commonly occurring amino...Ch. 15 - Discuss how degeneracy of the genetic code makes...Ch. 15 - A scientist sequencing itiRNA identifies the...Ch. 15 - If mRNA is complementary to the DNA template...Ch. 15 - In your own words, describe the difference between...Ch. 15 - A fragment of bacterial DNA reads: 3’...Ch. 15 - A scientist observes that a cell has an RNA...Ch. 15 - Chronic lymphocytic leukemia patients often harbor...Ch. 15 - Transcribe and translate the following DNA...Ch. 15 - Explain how single nucleotide changes can have...Ch. 15 - A normal mRNA that reads 5’ -...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Figure 15.16 Many antibiotics inhibit bacterial protein synthesis. For example, tetracycline blocks the A site on the bacterial ribosome, and chloramphenicol blocks peptidyl transfer. What specific effect would you expect each of these antibiotics to have on protein synthesis? Tetracycline would directly affect: tRNA binding to the ribosome ribosome assembly growth of the protein chain Chloramphenicol would directly affect tRNA binding to the ribosome ribosome assembly growth of the protein chainarrow_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_forwardBriefly describe the function of the following in protein synthesis. a. rRNA b. tRNA c. mRNAarrow_forward
- Eukaryotic mRNA: usessnRNPs to cut out introns and seal together translatableexons. uses a spliceosome mechanism made of DNA to recognizeconsensus sequences to cut and splice. has a guanine cap on its 39 end and a poly(A) tail on its 59 end. is composed of adenine, thymine, guanine, and cytosine. codes the guanine cap and poly(A) tail from the DNAtemplate.arrow_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_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
- 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_forwardDuring translation, the mRNA template is read and amino acids corresponding to the codons are linked together. Use the labels on the left to identify the components of the image that are involved in translation. the growing polypeptide chain that becomes the new protein the mRNA transcript an uncharged tRNA that has been released from the E site a charged tRNA, carrying an amino acid the P site holds a tRNA with its amino acid bonded to the polypeptide chain the A site into which the charged tRNA will bind the ribosome ACC 44 GGGU a charged tRNA, carrying an amino acid AUG UAAarrow_forwardThe piece of eukaryotic mRNA below includes the region that codes for the binding site for the initiator tRNA needed in translation. 5'-GUUUCCCGUAUACAUGCGUGCCGGGGGC-3' Using the table below, which amino acid would you expect to be on the tRNA that is the first to bind to the A site of the ribosome? AGC AGA AGG GCA CGA CUA GGA GGC GCC CGC AUA CUC AGU CCA UCA ACA CCC UCC ACC UUC CCG UCG ACG UUU CCU UCU GCG CGG GAC AAC UGC GAA CAA GGG CAC AUC CUG AAA GCU CGU GAU AAU UGU GAG CAG GGU CAU AUU CUU AAG AUG Ala Arg Asp Asn Cys Glu Gin Gly His lle Leu Lys Met Phe Pro Ser O methionine O arginine O cysteine Ovaline UUA UUG OOOO GUA GUC UAC GUG ACU UGG UAU GUU Thr Trp Tyr Val UAA UAG UGA stoparrow_forward
- Which of the following events would NOT result in ribosomes stalling on an MRNA during translation? The MRNA in a given region is very highly folded, and the ribosome stalls because the RNA structure blocks its movement. O The correct tRNA is scarce because it is not transcribed very much in the prevailing conditions. The ribosome stalls while waiting for one of the scarce tRNAS to diffuse into the A site. O the release tactor enters the A site, decodes a stop codon and transfers an oxxYgen from water to the carboxyl group of the peptidyl-tRNA in the P site, causing stalling O Starvation for amino acids will reduce the amount of amino-acylated (charged) tRNA the ribosome will stall while waiting for a charged tRNA to enter the A site to decode the next codonarrow_forwardWhich of the following does NOT happen during translation initiation? The mRNA binds to the small ribosomal subunit Next, the initiator tRNA binds to mRNA The tRNA’s anticodon binds the mRNA codon The next tRNA enters the ribosome next to the initiator tRNA What ends translation during translation termination? (Circle all that apply) mRNA binds the large ribosomal subunit Stop codon is reached Release factor binds to stop codon Release factor binds to Ribosomearrow_forwardWhich of the following best describes a sequence of events that happens during the elongation phase of translation? Group of answer choices A charged tRNA enters the P site of a ribosome; a tRNA bound to a peptide moves to the A site; an tRNA bound to a peptide exits the E site. None of these is an accurate description A charged tRNA enters the A site of a ribosome; a tRNA bound to a peptide moves to the P site; an uncharged tRNA exits the E site. An uncharged tRNA enters the A site of a ribosome; a tRNA bound to a peptide moves to the P site; a charged tRNA exits the E site. A charged tRNA enters the A site of a ribosome; a tRNA bound to a peptide moves to the E site; an tRNA bound to a peptide exits the A site.arrow_forward
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