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Concept introduction: Eukaryotic gene expression is a process where the proteins are expressed and regulated in the eukaryotic cell. In a developing stage, the embryo differentiates its cells into specialized cell types based on the protein expressed in them. Genes are the fundamental units of heredity, which are composed of DNA. Each gene specifies a particular protein. For this, the genes will be converted into a useful product through the process of gene expression. Gene expression involves the conversion of DNA into RNA through the process of transcription. Then, this RNA will be converted into proteins through the process of translation.
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- As trytophan levels increase in the cell, _____ bind(s) to active aporepressors, causing ______ of tryptophan operon. a. inducers, negative regulation b. repressors, co-repressing c. tryptophan, negative regulation d. tryptophan, positive regulation e. B-lactose, negative regulationarrow_forwardProteins that influence RNA synthesis by binding directly to DNA are called_____ . a. promoters c. operators b. transcription factors d. enhancersarrow_forwardIn prokaryotic cells, mRNA is translated as soon as it is transcribed because prokaryotes have... A. No nuclear membranes B. Fewer genes than eukaryotes C. Genes contained in plasmids D. A and Barrow_forward
- The experimental growth of an eye on the leg of a fruit fly is most famous for providing direct evidence that________ Select one: a. proteins are involved making eyes b. genes are involved in making eyes c. one operon can control many genes d. genes are regulated via negative feedback e. that one transcriptional factor can regulate many genesarrow_forwardWhich of these BEST DESCRIBE tryptophan in the Trp Operon? A. Acts as a corepressor B. Acts as a coactivator C. Acts as an inducer D. Acts as an enhancerarrow_forwardProkaryotic gene regulation occurs at the level of ________. a. translation b. transcription c. both transcription and translationarrow_forward
- In prokaryotes, the trp operon is under ________ that ________ prevents RNA polymerase from binding. a. negative regulation; biochemically b. negative regulation; physically c. positive regulation; biochemicallyarrow_forwardTranscription factors include ______________. a. silencers and enhancers b. promoters and insulators c. activators, repressors, and translational factors d. activators and repressors e. enhancers and repressorsarrow_forwardProkaryotic transcripts are _____________ since several proteins can be produced from one mRNA. a. polycistronic b. monocistronic c. tricistronic d. bicistronicarrow_forward
- A repressor is a __________ that _________ transcription. a. small effector molecule, inhibits b. small effector molecule, enhances c. regulatory protein, inhibits d. regulatory protein, enhancesarrow_forwardEukaryotic cells have multiple complex mechanisms for the regulation of gene expression, but a regulatory mechanism they rarely (if ever) use is a. operons. b. regulatory proteins. c. transcriptional factors. d. promoters.arrow_forwardGenes of related function frequently cluster into: please explain the answer a.transcripts b.oligomers c.operons d. operatorsarrow_forward
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