Exam 14: Rna Molecules and Rna Processing

A) Both are found in mitochondrial genes.
B) Both are found in bacteriophages.
C) Both are known to be self-splicing introns.
D) Both are found in protein-coding genes of chloroplasts.
E) Both are frequently found in eukaryotic genes.

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A) mRNA
B) tRNA
C) rRNA
D) snRNA
E) miRNA

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A) The number of introns is always less than the number of exons in a gene.
B) Introns are degraded in the cytoplasm.
C) All eukaryotic genes contain an intron.
D) Mitochondrial and chloroplast genes do not contain introns.
E) Introns do not contain sequence-specific information.

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Guide RNAs (gRNAs) are short synthetic R...

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A) GU at the 5' splice site at the beginning of the intron
B) AG at the 3' splice site at the end of the intron
C) CCA at the 3' site downstream of the branch point
D) a at the lariat branch point site
E) 3' CAGG consensus sequence at the 3'splice site

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MicroRNAs (miRNAs) are small non-coding ...

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A) U1
B) U2
C) U5
D) U6
E) spliceosomal proteins

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Splicing is the process by which non-cod...

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C. elegans, also known as Caenorhabditis...

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An snRNP, or small nuclear ribonucleopro...

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A) prokaryotic 16S rRNA
B) prokaryotic 23S rRNA
C) eukaryotic 18S rRNA
D) eukaryotic 5.8S rRNA
E) eukaryotic 5S rRNA

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A) The stability of mRNA transcripts in the cytoplasm is affected by the poly(A) tail.
B) The poly(A) tail facilitates the attachment of the ribosome to the mRNA.
C) The poly(A) tail is important for proper nuclear export of the mRNA.
D) The poly(A) tail at the 3' end translates to a long stretch of repeated amino acids.
E) Multiple proteins will recognize and bind to the poly(A) tail in the cytoplasm.

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A) Transcription would continue past the end of the gene coding sequence resulting in a longer pre-mRNA transcript.
B) Translation would continue past the end of the gene coding sequence resulting in a longer pre-mRNA transcript.
C) Transcription would not occur as the transcription factors would not be able to bind to the promoter.
D) Translation would not occur as the ribosome would not be able to bind to the mRNA.
E) Replication would not occur as DNA polymerase would not be able to bind to the DNA at the origin of replication.

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A) A shorter than normal protein would be produced.
B) Replication would be inhibited.
C) A longer than normal mRNA would be produced.
D) A longer than normal DNA would be produced.
E) Transcription would terminate prematurely.

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A) 1, 2, 3, 4
B) 2, 4, 1, 3
C) 4, 1, 3, 2
D) 2, 1, 4, 3
E) 3, 2, 4, 1

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A) The U2 snRNA would not be able to bind to the branch point because it could not recognize it.
B) The spliceosome complex would be degraded because it could no longer recognize the 5ʹ splice site.
C) The U1 snRNA would not be able to bind complementarily to the 5ʹ splice site.
D) Splicing would still occur appropriately because the G is not essential at the 5ʹ splice site.
E) The 5ʹ cap would not be able to be added because it requires the 5ʹ splice site to be functional.

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A) regulated transcription
B) RNA interference
C) alternative RNA processing
D) RNA editing
E) colinearity

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A) regulated transcription
B) RNA interference
C) alternative RNA processing
D) self-splicing of introns
E) RNA methylation

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