Beckers World of the Cell Study Set 1

Biology

Quiz 18 :
Gene Expression: Ithe Genetic Code and Transcription

Quiz 18 :
Gene Expression: Ithe Genetic Code and Transcription

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Which of the following amino acids is not one of the 20 common amino acids found in cells?
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Answer:

E

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You are studying a eukaryotic gene whose initial transcript is 1500 nucleotides in length.The mature mRNA derived from the gene is 1200 nucleotides in length.What is the most probable reason for the discrepancy?
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Answer:

B

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Imagine that the genetic code were read in a non-overlapping fashion,using only two nucleotides to specify an amino acid (i.e.,the sequence above would be read: AU-GA-UG and so on).Which of the following polypeptides would be obtained by translating the sequence above?
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Answer:

E

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Imagine that the genetic code were read in an overlapping fashion,using three nucleotides to specify each amino acid (i.e.,the sequence above would be read: AUG-UGA-GUA and so on).Which of the following polypeptides would be obtained by translating the sequence above?
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Imagine that the genetic code were read in a non-overlapping fashion,using four nucleotides to specify each amino acid (i.e.,the sequence above would be read: AUGA-UGAU-GUAG).Which of the following polypeptides would be obtained by translating the sequence above?
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According to the central dogma,the process by which information in an RNA molecule is used to direct the synthesis of a polypeptide is called
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Consider the following double-stranded DNA sequence that codes for a short polypeptide. 5'-A-T-G-T-G-G-C-C-A-C-T-A-T-A-A-T-C-A-3' 3'-T-A-C-A-C-C-G-G-T-G-A-T-A-T-T-A-C-T-5' Which strand is the coding strand,and where is the N-terminal end of the resulting peptide located?
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Which of the following is not a true statement regarding the genetic code?
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An individual has been infected with a particular retrovirus.In order for the latent virus DNA to be inherited by subsequent generations stemming from this individual,it must be found
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Which of the following patterns of information flow is unique to retroviruses within a cell?
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In eukaryotic cells,we sometimes find reverse transcriptase activity,even though the cells are not infected with a retrovirus.This activity can be attributed to
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Which of the following molecules can be considered a final product in the flow of information within a cell?
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Which of the following enzymes is required in order to produce DNA molecules complementary to mRNA transcripts?
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You wish to design a drug that acts against a recently identified retrovirus.Based upon what you know about retroviruses,which of the following would be the best target for specifically interrupting the viral life cycle in eukaryotic cells?
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The human immunodeficiency virus (HIV)is an example of a retrovirus.In order to prevent incorporation of the viral DNA into the host genome,antiretroviral drugs could
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One consequence of the lack of introns in bacterial genes is that
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Which of the following DNA regions is recognized by RNA polymerase during transcription?
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Which of the following is not a reason for the importance of mRNA processing in eukaryotes?
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Which of the following enzymes is responsible for transcribing tRNA in eukaryotic cells?
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Which of the following is not associated with mRNA processing in eukaryotes?
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