Transcription and Translation Practice Test

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• During transcription, RNA base pairing occurs with which DNA strand and in which orientation?
• Which statement best describes the role of histone acetylation in transcription?
• In a sequence with AUG...UAA and multiple ORFs, how is the canonical start codon most reliably identified in eukaryotes?
• Which two features are found on a tRNA molecule as described?
• Which statement about the 5' cap is true?
• Define attenuation and give an example operon.
• In eukaryotic translation initiation, which context around start codon enhances initiation?
• What is the primary role of tRNA?
• What is the role of signal recognition particle (SRP) during ER translation?
• In lac operon regulation, which molecule inactivates the lac repressor when lactose is present?
• Which RNA polymerase transcribes mRNA in eukaryotes?
• What is a Kozak sequence and its significance?
• tRNA's role in translation is to
• How can epigenetic modifications influence transcription levels?
• What are the roles of the 5' cap and the poly(A) tail?
• What determines reading frame in an mRNA sequence?
• What is the difference between primary transcripts and functional mRNA in terms of processing?
• Which statement best contrasts transcriptional regulation in bacteria and eukaryotes?
• What is added to the 3' end of eukaryotic mRNA during processing?
• How does codon usage bias influence translation efficiency?
• Which sequence correctly describes elongation steps and the roles of EF-Tu and EF-G in bacterial translation?
• How many stop codons exist in the standard genetic code?
• Which sequence describes the initiation of transcription in bacteria?
• Is rRNA a ribozyme?
• Which event is the first step in the initiation process?
• The TATA box is located on which DNA strand?
• In eukaryotes, termination involves which signal and processing?
• Which mutation changes a codon to code for a different amino acid?
• During initiation of transcription, which event involves RNA polymerase?
• Which enzyme complex forms the RNA polymerase holoenzyme in bacteria, enabling promoter binding?
• During transcription elongation, what happens?
• Which mutation involves insertion or deletion that shifts the reading frame?
• What is the role of peptidyl transferase?
• Which statement is true about point mutations?
• Which enzyme class is commonly responsible for A-to-I RNA editing?
• How many codons encode amino acids, and how many are stop codons?
• Which technique can quantify mRNA abundance with high sensitivity?
• In rho-dependent termination, what does rho do?
• Which molecules are required for translation according to the material?
• Which statement defines a point mutation?
• What happens to DNA after the RNA is synthesized during transcription?
• What is tRNA charging and what enzyme mediates it?
• Transcription factors function to do what?
• Outline the steps of transcription initiation in bacteria.
• How do molecular chaperones assist protein folding?
• Which event is part of RNA processing that helps mRNA function in translation?
• Which statement best describes the wobble hypothesis in genetic decoding?
• Which feature is essential for efficient translation initiation in eukaryotes?
• Exons are
• How does mitochondria differ in transcription and translation compared to the nucleus?
• In bacteria, which factor recycles ribosomal subunits after termination?
• Which statement best describes the direction of transcription by RNA polymerase?
• RNA editing is a post-transcriptional alteration of RNA sequence. Which example is correct?
• Which statement best defines transcription?
• Wobble hypothesis and codon-anticodon pairing describe:
• Which experimental technique is used to study transcription initiation in vivo by measuring the binding of transcription factors or RNA polymerase to promoters?
• Which mutation type is associated with splicing alterations?
• What is the role of release factors in translation termination?
• What are the steps of the translation elongation cycle?
• Is energy used in translation termination?
• How does translation termination differ between prokaryotes and eukaryotes?
• Which nucleotide is typically the branch point in the intron during splicing?
• What is the purpose of nonsense-mediated decay (NMD)?
• What does wobble base pairing describe in translation?
• Which chromatin modifications are associated with active transcription?
• In prokaryotes and eukaryotes, how does termination differ?
• During transcription elongation, in which direction is RNA synthesized?
• What are polyribosomes?
• In bacteria, what marks the transition from promoter binding to the start of RNA synthesis?
• Explain how microRNAs can influence translation without changing mRNA abundance.
• Which type of cell contains transcription factors?
• Which event completes ribosome assembly by attaching the large subunit?
• What is tRNA charging and what enzyme is responsible?
• What are the major steps of mRNA processing in eukaryotes after transcription?
• How many codons are there in the standard genetic code?
• A missense mutation results in what change?
• During RNA splicing, introns are
• What happens to mRNA after transcription?
• Name the release factors in bacteria and eukaryotes.
• What does codon degeneracy mean?
• What ensures correct amino acid incorporation during translation via tRNA anticodon pairing?
• During transcription initiation by RNA polymerase II, what event terminates the initiation phase and commits to elongation?
• Alternative splicing results in what outcome?
• In prokaryotes, what element helps identify the start codon?
• What is the structure of a eukaryotic ribosome and its subunits?
• In bacteria, what occurs after promoter escape during transcription initiation?
• What do ribosomal RNA do?
• If splice site consensus sequences mutate, what is the likely outcome?
• In elongation, which step is translocation of the ribosome?
• Do prokaryotic cells have promoters for transcription initiation?
• What is Nonsense-Mediated Decay (NMD) and when does it occur?
• In eukaryotes, which factor is involved in ribosome recycling?
• Which statement best describes lac operon regulation when lactose is present and glucose is low?
• Why are there only 45 different tRNA for 61 codons?
• Spliceosome components include
• Which of the following is a common post-translational modification?
• Introns are
• Which type of mutations primarily affect transcription versus translation?
• What happens to the DNA template during initiation of transcription?
• Distinguish transcriptional vs post-transcriptional regulation.
• RNA polymerase II primarily transcribes which class of RNA?
• What is the consequence of a frameshift insertion or deletion?
• During elongation, which protein facilitates translocation of the ribosome along mRNA and uses GTP hydrolysis?
• Does DNA stay open during transcription?
• What is the start codon?
• An insertion leading to a frameshift results in which mutation?
• How do enhancers regulate transcription at a distance?
• Which site is the aminoacyl tRNA site?
• In prokaryotes, what triggers transcription termination?
• The spliceosome is composed of
• What is the fundamental difference between transcription and translation in bacteria, and which enzymes drive each process?
• How is translation termination?
• During initiation of transcription, which event typically occurs first?
• Which enzyme performs C-to-U RNA editing in mammals?
• A mutation that disrupts the 5' cap would most likely cause which of the following outcomes?
• UTR stands for
• Explain the concept of reading frame in translation.
• How does translation initiation differ between prokaryotes and eukaryotes, focusing on the ribosome binding site and initiator tRNA?
• Describe the key promoter elements recognized by RNA polymerase II in eukaryotes.
• What moves in translation?
• What is the key difference in translation between prokaryotes and eukaryotes?
• What is the size of the mitochondrial ribosome?
• What is the function of ribosome recycling factor after translation termination?
• Which initiation step involves detection of the start codon?
• Which statement correctly describes RNA polymerases in bacteria and eukaryotes?
• A frameshift mutation is described as what?
• Spliceosome is best described as what?
• In eukaryotes, where does transcription occur?
• Which protein recognizes the TATA box in many eukaryotic promoters?
• What is the Kozak consensus sequence and its significance?
• What roles does TFIIH play in eukaryotic transcription initiation?
• Which enzyme charges tRNA with its amino acid?
• Describe the role of the branch point adenine in intron splicing.
• Name and describe the two main termination mechanisms in bacterial transcription.
• How do capping and polyadenylation influence mRNA export from the nucleus?
• Approximately how many GTP molecules are used per amino acid added during elongation, and is initiation GTP usage extra?
• What is a promoter in molecular biology?
• Which mutation arises from wobble in codon-anticodon pairing?
• Which of the following are promoter elements in bacteria?
• An RNA molecule that acts as an enzyme is called a
• Point mutations can affect which genetic material?
• The TATA box is composed of which repeating sequence?
• Which codons are the standard stop codons?
• True or false: Transcription and translation are coupled in bacteria, allowing rapid protein production.
• A nonsense mutation introduces what?
• In elongation, which step involves peptide bond formation?
• What is a signal peptide and how does it relate to the secretory pathway?
• What is the role of a promoter in transcription?
• Which statement about stop codons is true?
• Which ribosomal site holds the growing polypeptide chain during translation?
• Which statement best describes the Kozak sequence?
• Which mutation typically results in a completely different protein due to reading frame shift?
• Which initiation event represents the binding of the small subunit with tRNA to mRNA at the 5' end?
• Which sequences are stop codons?
• Where does translation initiate on the mRNA?
• What is the function of the 5' cap added to mRNA?
• What is a reading frame shift and give an example of a consequence?
• Which statement about the A, P, and E sites in the ribosome is correct?
• Wobble refers to which aspect of translation?
• Which description correctly differentiates mature mRNA from pre-mRNA?
• Which molecule recognizes stop codons to terminate translation?
• What is the role of exons and introns; what is alternative splicing?
• What is a spliceosome?
• What is the CTD of RNA polymerase II and why is it important?
• What is the role of a poly-A tail in mRNA?
• How does aminoacyl-tRNA synthetase charge tRNA with its amino acid?
• Polyadenylation serves which primary roles for mRNA?
• Which statements accurately describe basic splice-site signals?
• What is the role of the sigma factor in bacterial transcription?
• Which RNA component base pairs with the Shine-Dalgarno sequence to position the start codon in bacteria?
• Which method maps transcription start sites genome-wide?
• Describe the structure of the bacterial ribosome and its subunits.
• Silent mutation due to wobble results in no amino acid change.
• What are common post-translational modifications?
• What does the 5' cap-binding complex do in translation initiation?
• What is the role of the mediator complex in transcription regulation?
• What is the 5' cap made of and what functions does it serve?
• Which types of RNA can be produced by transcription?
• How does translation initiation differ between bacteria and eukaryotes?
• Which statement best describes initiation order in eukaryotes and prokaryotes?
• What is the general consequence of a frameshift mutation on the resulting protein?
• The poly-A tail is added to which end of eukaryotic mRNA?
• In elongation, where is energy used?
• What do E, P, A stand for?
• What is a frameshift mutation?
• Which type of cell has a TATA box in promoter regions?
• Which step is the first in translation termination?
• Which feature contributes to efficient translation initiation in eukaryotes around AUG?
• Which statement best defines transcription factors?
• Which statement about start codons and initiating amino acids is correct?
• How does the ribosome know where to terminate translation at the end of a coding region?
• In translation elongation, which enzyme forms the peptide bond between amino acids?
• What are initiation factors and give examples in bacteria and eukaryotes.
• What is the basic unit of the genetic code that specifies an amino acid?
• Which is required for transcription to occur on a gene?
• Which mutation creates a stop codon where an amino acid should be?
• How does attenuation regulate the tryptophan operon in bacteria?
• How many codons are there in the genetic code?
• Which process adds a poly(A) tail to mRNA?
• Define RNA editing and name a common type.
• Which method besides CAGE can map transcription start sites genome-wide?
• Which statement best describes lac operon regulation when lactose is absent and glucose is high?
• A silent mutation is characterized by which outcome?
• What is the purpose of RNA processing in eukaryotes?
• Which initiator tRNA carries the initial amino acid in bacteria?
• Name the two main promoter elements in bacterial transcription and what they recruit.
• What codon marks the start of translation in mRNA?
• Which features are introduced to mRNA during maturation to promote stability and translation?
• What characterizes rho-independent termination?
• Which ribosomal site is the Exit site?
• Which components assemble with pre-mRNA to recognize splice sites and catalyze intron removal and exon ligation?
• What is transcription?
• RNA polymerase II in eukaryotes catalyzes transcription of which RNA species?
• Which statement lists antibiotics that affect translation at the ribosome level and their targets?
• RNA splicing is the process of
• How is tRNA described structurally?
• Which antibiotic inhibits bacterial RNA polymerase initiation and what is its effect?
• In lac operon regulation, what is the role of CAP-cAMP?
• In elongation, which step occurs first?
• What is polysomes and what does it reflect about translation?
• What feature distinguishes group I introns from nuclear introns in terms of splicing?
• What is the Shine-Dalgarno sequence and where is it located?
• Which types of cells have a transcription start point?
• What is an operon and what types of regulation exist in bacteria?
• What is the primary purpose of ribosome profiling (Ribo-Seq) in studying translation?
• Which statement best describes transcription termination?
• Which statement best describes how promoter elements interact with transcription factors in eukaryotes?
• Where does transcription occur in prokaryotes?
• Which of the following is a promoter element in eukaryotes?
• What signals indicate the 5' and 3' splice sites?
• Which of the following is an example of a post-transcriptional regulatory mechanism?
• Identify Shine-Dalgarno sequence and its function.
• The untranslated region (UTR) refers to segments of mRNA that are
• In eukaryotes, what factors terminate transcription by RNA polymerase II?
• Frameshift mutations often produce which of the following?
• Where is amino acid added during elongation?
• Which signals indicate the 5' and 3' splice sites during intron removal?
• In bacterial translation elongation, which factor delivers aminoacyl-tRNA to the A site?