Regarding the trp operon: when levels of tryptophan are low, the ___ hairpin forms, resulting in _____ of transcription.  Group of answer choices 2-3; termination 3-4; termination 3-4; continuation 2-3; continuation

The operator of the lactose operon in E. Coli is located:     between the promoter and the repressor gene     upstream of the promoter     between the promoter and the structural genes     anywhere on the chromosome     among the structural genes

You just isolated a mutant in the eukaryotic organism C. elegans (aka the world's coolest model organism) that fails to transcribe your favorite gene. Which of the following region(s) are likely to contain your mutation? (You may choose more than one.) Group of answer choices Rut site -10 consensus sequence Rho protein TATA box Sigma subunit binding site Transcription start site

The lac operon produces: (choose the best answer) OA single mRNA molecule O A single protein OA single mRNA molecule and a single protein O Multiple proteins OA single mRNA molecule and multiple proteins

The organization and function of the lac operon in E. coli is shown in the following figures: XXI Transcription Repressor mRNA Translation RNA polymerase M M Flask ZYA XXXX Active M-repressor protein Repressor active, operon off. The repressor protein binds with the operator, preventing transcription from the operon. (a) An inducible operon Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings Allolactose (inducer) Carbon/Energy Source 0 Z MInactive repressor protein (a) An inducible operon Transcription Translation XXX Permease B-Galactosidase Transacetylase Operon mRNA 3 Repressor inactive, operon on. When the inducer allolactose binds to the repressor protein, the inactivated repressor can no longer block transcription. The structural genes are transcribed, ultimately resulting in the production of the enzymes needed for lactose catabolism. Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings Suppose you inoculate three flasks of minimal…

Translational control of gene expression in humans regulates the synthesis of: RNA from an RNA template protein from an RNA template DNA from a DNA template protein from a DNA template RNA from a DNA template

Which of the following general transcription factors aids polymerase binding in the right direction on promoters?  Group of answer choices TFIID TFIIB TFIIA TFIIF

A string of 8 adenine nucleotides in the mRNA is required for function of an intrinsic transcription terminator in bacteria. True False

In eukaryotic transcription, which of the following is not included in the initiation of transcription? Group of answer choices RNA polymerase II TATA box Holoenzyme AAUAAA consensus sequence

An E. coli cell as the following genotype for the lac operon system:  I- OC Z+ / F’ I+.  Which term best describes the regulation of expression of the beta galactosidase in this cell? Group of answer choices Inducible None of these Activated Always repressed Constitutive