In the lac operon, the product of structural gene lacz is capable ofO forming lactose from lactose precursorsO repressing the lactose operonO cleaving the lactose disaccharide into glucose and galactoseO producing zinc finger nucleasesO transporting lactose into the cell

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Description: In the lac operon, the product of structural gene lacz is capable ofO forming lactose from lactose precursorsO repressing the lactose operonO cleaving the lactose disaccharide into glucose and galactoseO producing zinc finger nucleasesO transporting

Lac operon is a gene expression regulatory system that is responsible for the transport and…

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Biology

In the lac operon, the product of structural gene lacz is capable of

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter14: Gene Regulation

Section: Chapter Questions

Problem 2TYU

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A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcription
A binding site for RNA polymerase is called a ________. a. gene c. codon b. promoter d. protein
In the lac operon, the product of structural gene lacZ is capable of ________. producing zinc finger nucleases transporting lactose into the cell repressing the lactose operon forming lactose from lactose precursors cleaving the lactose disaccharide into glucose and galactose
Which of the following molecules is an inducer of the lac operon:a. Galactose d. Isothiocyanateb. Glucose e. cAMPc. Allolactose f. Lactose
When an individual drink's a product with lactose (e.g., whole milk), what happens to the repressor system of the lac operon? The lac repressor is inactivated Transcription of the lac operon genes into a single mRNA β-galactosidase and lac permease are synthesized Lactose is rapidly metabolized by enzymes
The lac operon contains the genes that the bacterium needs to be able to use lactose as a carbon source. What would happen to the regulation of the Lac operon if: a) a mutation has occurred in the Lac Z gene which results in the formation of no functional β-galactosidase b) a mutation has occurred in the CAP protein so that cAMP cannot bind
When both glucose and lactose are present (regarding the lac operon): Group of answer choices cyclic AMP is high so transcription occurs the lac repressor binds with the lactose and transcription occurs RNA polymerase is able to bind to the operator so transcription occurs cAMP is low, and transcription is turned off
A mutation at the operator prevents the regulator protein from bindingWhat effect will this mutation have in the following types of operons? a. Regulator protein is a repressor of a repressible operon. b. Regulator protein is a repressor of an inducible operon.
For the lac operon, determine whether genes will be expressed (on) or silenced (off) given the following: a. Lactose levels are high, glucose is low. b. The lac repressor can no longer bind DNA; lactose and glucose are low.
Strain ROFL4 has a premature stop mutation in the lacZ gene, resulting in a nonfunctional b-galactosidase. Otherwise all other parts of the operon are functional. Circle the least number of components for an F' plasmid that will restore normal regulation and function of the lac operon in the resulting partial diploid. (may need more than one) (a) lacI+ (b) lacO+ (c) lacP+ (d) lacZ+ (e) None, cannot be restored.
In order for the lac operon to be triggered, lactose must be present and ________. a. cAMP levels low b. glucose stores depleted c. glucose levels high
Why do eukaryotic cells not have a lac operon? A. Eukaryotic cells cannot transcribe multiple genes under one promoter B. Eukaryotic cells dont have repressors C. They can always metabolize lactose