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This deck focuses on Regulation Of Gene Transcription, giving you a quick way to review the definitions, rules, and examples that matter most for AP Biology.
AP Biology Flashcards: Regulation Of Gene Transcription
Study Regulation Of Gene Transcription in AP Biology with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.
AP Biology
Regulation Of Gene Transcription
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Identify the process where small RNAs regulate gene expression post-transcriptionally.
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ANSWER
RNA interference. Uses small RNAs to silence target genes.
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Flashcard 1: Identify the process where small RNAs regulate gene expression post-transcriptionally.
Answer: RNA interference. Uses small RNAs to silence target genes.
Flashcard 2: Identify the role of general transcription factors in eukaryotes.
Answer: Assist in forming the transcription initiation complex. Required for RNA polymerase binding and function.
Flashcard 3: Identify the region where transcription terminates in prokaryotes.
Answer: Terminator sequence. Signals the end of transcription in bacteria.
Flashcard 4: Which molecule can prevent transcription in an operon by binding to the operator?
Answer: Repressor. Blocks transcription when bound to operator.
Flashcard 5: What is the function of an enhancer in transcription regulation?
Answer: Increases transcription levels by interacting with activators. DNA sequences that boost gene expression remotely.
Flashcard 6: What is the primary structure that RNA polymerase binds to initiate transcription?
Answer: Promoter. Essential regulatory region for transcription start.
Flashcard 7: Identify the enzyme that synthesizes RNA during transcription.
Answer: RNA polymerase. The primary enzyme responsible for RNA synthesis.
Flashcard 8: Which RNA polymerase is responsible for rRNA synthesis in eukaryotes?
Answer: RNA polymerase I. Produces ribosomal RNA in the nucleolus.
Flashcard 9: What is the function of RNA polymerase III in eukaryotes?
Answer: Transcribes tRNA and some small RNAs. Synthesizes transfer RNA and regulatory RNAs.
Flashcard 10: What is the consequence of a mutation in the TATA box?
Answer: Altered gene expression due to faulty transcription initiation. Disrupts normal transcription factor binding.
Flashcard 11: What is the function of a silencer in gene regulation?
Answer: Decreases transcription by binding repressor proteins. Regulatory elements that reduce gene expression.
Flashcard 12: Identify the process where small RNAs regulate gene expression post-transcriptionally.
Answer: RNA interference. Uses small RNAs to silence target genes.
Flashcard 13: What determines the strength of a promoter in gene transcription?
Answer: Affinity for transcription factors and RNA polymerase. Binding efficiency determines transcription frequency.
Flashcard 14: Identify the role of histone acetylation in gene transcription.
Answer: Increases transcription by loosening DNA-histone interaction. Opens chromatin structure for gene accessibility.
Flashcard 15: Define an operon.
Answer: A cluster of genes regulated together. Found in prokaryotes for coordinated gene control.
Flashcard 16: Identify the effect of histone deacetylation on transcription.
Answer: Decreases transcription by tightening DNA-histone interaction. Compacts chromatin, reducing gene accessibility.
Flashcard 17: Which factor is crucial for the termination of transcription in bacteria?
Answer: Rho factor. Protein-dependent transcription termination mechanism.
Flashcard 18: Which process involves the removal of introns from pre-mRNA?
Answer: RNA splicing. Removes non-coding sequences from pre-mRNA.
Flashcard 19: Identify the region where transcription terminates in prokaryotes.
Answer: Terminator sequence. Signals the end of transcription in bacteria.
Flashcard 20: What is the primary role of the mediator complex in transcription?
Answer: Facilitates interaction between transcription factors and RNA polymerase. Bridges regulatory proteins with transcription machinery.
Flashcard 21: Identify the role of general transcription factors in eukaryotes.
Answer: Assist in forming the transcription initiation complex. Required for RNA polymerase binding and function.
Flashcard 22: What determines the strength of a promoter in gene transcription?
Answer: Affinity for transcription factors and RNA polymerase. Binding efficiency determines transcription frequency.
Flashcard 23: Which element is essential for transcription initiation in eukaryotes?
Answer: Promoter. Required regulatory sequence for gene expression.
Flashcard 24: What is the function of an enhancer in transcription regulation?
Answer: Increases transcription levels by interacting with activators. DNA sequences that boost gene expression remotely.
Flashcard 25: Identify the role of histone acetylation in gene transcription.
Answer: Increases transcription by loosening DNA-histone interaction. Opens chromatin structure for gene accessibility.
Flashcard 26: Which process can silence genes via RNA-induced silencing complex (RISC)?
Answer: RNA interference. Post-transcriptional gene silencing mechanism.
Flashcard 27: Which molecule can prevent transcription in an operon by binding to the operator?
Answer: Repressor. Blocks transcription when bound to operator.
Flashcard 28: Which molecule acts as an inducer in the lac operon?
Answer: Allolactose. Derived from lactose, activates the lac operon.
Flashcard 29: What is the function of a silencer in gene regulation?
Answer: Decreases transcription by binding repressor proteins. Regulatory elements that reduce gene expression.
Flashcard 30: What is the main purpose of transcriptional activators?
Answer: Increase transcription by binding to enhancers. Promote gene expression by recruiting RNA polymerase.
Flashcard 31: What is the primary role of the mediator complex in transcription?
Answer: Facilitates interaction between transcription factors and RNA polymerase. Bridges regulatory proteins with transcription machinery.
Flashcard 32: What is the purpose of alternative splicing?
Answer: Generates different mRNA variants from the same gene. Increases protein diversity from a single gene.
Flashcard 33: What is the main purpose of transcriptional activators?
Answer: Increase transcription by binding to enhancers. Promote gene expression by recruiting RNA polymerase.
Flashcard 34: Which process can silence genes via RNA-induced silencing complex (RISC)?
Answer: RNA interference. Post-transcriptional gene silencing mechanism.
Flashcard 35: What is the purpose of alternative splicing?
Answer: Generates different mRNA variants from the same gene. Increases protein diversity from a single gene.
Flashcard 36: What is the function of the TATA box in eukaryotic promoters?
Answer: Indicates where transcription starts by binding transcription factors. Core promoter element crucial for transcription initiation.
Flashcard 37: What is the consequence of a mutation in the TATA box?
Answer: Altered gene expression due to faulty transcription initiation. Disrupts normal transcription factor binding.
Flashcard 38: Identify the role of a repressor protein in transcription.
Answer: Binds to operators to block RNA polymerase. Prevents transcription when bound to operator sequences.
Flashcard 39: Which factor is crucial for the termination of transcription in bacteria?
Answer: Rho factor. Protein-dependent transcription termination mechanism.
Flashcard 40: Identify the enzyme that synthesizes RNA during transcription.
Answer: RNA polymerase. The primary enzyme responsible for RNA synthesis.
Flashcard 41: Identify the protein that unwinds DNA for transcription initiation.
Answer: Helicase. Separates DNA strands for RNA polymerase access.
Flashcard 42: What is the role of an operator in an operon system?
Answer: Regulates transcription by interacting with repressors. DNA sequence that controls repressor binding.
Flashcard 43: Identify the role of coactivators in transcription regulation.
Answer: Enhance transcription by linking activators to the transcription machinery. Bridge activators to the transcription complex.
Flashcard 44: Which type of RNA is synthesized from DNA during transcription?
Answer: mRNA, tRNA, and rRNA. All RNA types produced during transcription.
Flashcard 45: Which RNA polymerase transcribes mRNA in eukaryotes?
Answer: RNA polymerase II. Specifically synthesizes messenger RNA transcripts.
Flashcard 46: Which RNA polymerase transcribes mRNA in eukaryotes?
Answer: RNA polymerase II. Specifically synthesizes messenger RNA transcripts.
Flashcard 47: Which RNA polymerase is responsible for rRNA synthesis in eukaryotes?
Answer: RNA polymerase I. Produces ribosomal RNA in the nucleolus.
Flashcard 48: What occurs when a transcription factor binds an enhancer?
Answer: Increases transcription by stabilizing the transcription complex. Enhances transcriptional machinery assembly.
Flashcard 49: What is the role of an operator in an operon system?
Answer: Regulates transcription by interacting with repressors. DNA sequence that controls repressor binding.
Flashcard 50: What is the role of a promoter region in gene transcription?
Answer: Initiates transcription by binding RNA polymerase. Acts as the binding site where transcription begins.
Flashcard 51: What is the function of RNA polymerase III in eukaryotes?
Answer: Transcribes tRNA and some small RNAs. Synthesizes transfer RNA and regulatory RNAs.
Flashcard 52: Which element is essential for transcription initiation in eukaryotes?
Answer: Promoter. Required regulatory sequence for gene expression.
Flashcard 53: What is the function of the 5' cap in mRNA?
Answer: Protects mRNA from degradation and aids ribosome binding. Stabilizes mRNA and facilitates translation initiation.
Flashcard 54: Define an operon.
Answer: A cluster of genes regulated together. Found in prokaryotes for coordinated gene control.
Flashcard 55: What is the primary structure that RNA polymerase binds to initiate transcription?
Answer: Promoter. Essential regulatory region for transcription start.
Flashcard 56: Identify the effect of histone deacetylation on transcription.
Answer: Decreases transcription by tightening DNA-histone interaction. Compacts chromatin, reducing gene accessibility.
Flashcard 57: What does the sigma factor do in bacterial transcription?
Answer: Guides RNA polymerase to the promoter. Helps RNA polymerase recognize specific promoters.
Flashcard 58: Identify the protein that unwinds DNA for transcription initiation.
Answer: Helicase. Separates DNA strands for RNA polymerase access.
Flashcard 59: Identify the role of a repressor protein in transcription.
Answer: Binds to operators to block RNA polymerase. Prevents transcription when bound to operator sequences.
Flashcard 60: What is the function of the TATA box in eukaryotic promoters?
Answer: Indicates where transcription starts by binding transcription factors. Core promoter element crucial for transcription initiation.
Flashcard 61: What is an example of a post-transcriptional modification?
Answer: 5' capping or polyadenylation. RNA processing that occurs after transcription.
Flashcard 62: Which molecule acts as an inducer in the lac operon?
Answer: Allolactose. Derived from lactose, activates the lac operon.
Flashcard 63: Which chemical modification of DNA is associated with repression of transcription?
Answer: DNA methylation. Silences genes by adding methyl groups to cytosine.
Flashcard 64: What is the function of the 5' cap in mRNA?
Answer: Protects mRNA from degradation and aids ribosome binding. Stabilizes mRNA and facilitates translation initiation.
Flashcard 65: Identify the role of coactivators in transcription regulation.
Answer: Enhance transcription by linking activators to the transcription machinery. Bridge activators to the transcription complex.
Flashcard 66: What occurs when a transcription factor binds an enhancer?
Answer: Increases transcription by stabilizing the transcription complex. Enhances transcriptional machinery assembly.
Flashcard 67: Which molecule is a transcription factor that regulates gene expression?
Answer: Proteins that bind to DNA sequences. Regulatory proteins that control gene expression levels.
Flashcard 68: What is the role of a promoter region in gene transcription?
Answer: Initiates transcription by binding RNA polymerase. Acts as the binding site where transcription begins.
Flashcard 69: Which process involves the removal of introns from pre-mRNA?
Answer: RNA splicing. Removes non-coding sequences from pre-mRNA.
Flashcard 70: Which molecule is a transcription factor that regulates gene expression?
Answer: Proteins that bind to DNA sequences. Regulatory proteins that control gene expression levels.
Flashcard 71: What does the sigma factor do in bacterial transcription?
Answer: Guides RNA polymerase to the promoter. Helps RNA polymerase recognize specific promoters.
Flashcard 72: What is an example of a post-transcriptional modification?
Answer: 5' capping or polyadenylation. RNA processing that occurs after transcription.
Flashcard 73: Which type of RNA is synthesized from DNA during transcription?
Answer: mRNA, tRNA, and rRNA. All RNA types produced during transcription.
Flashcard 74: Which chemical modification of DNA is associated with repression of transcription?
Answer: DNA methylation. Silences genes by adding methyl groups to cytosine.