# Genotype of strain 1 lacI + lacPlacO + lacZ + lacY+ 2 lac lacPlacO + lacZ + lacY+ 3 lacI+ lacP + laco C lacZ + lacY+ 4 lac lacPlacO + lacZ + lacy 10 5 lac lacP lacO + lacZ + lacY+ lacl lacPlacO + lacZ-lacY+/ 6 lac lacPlacO + lacZ + lacY- Lactose absent Lactose absent Lactose present Lactose present Permease Rogal Permease 7 8 10 lac lacp+ lacO © lacZ + lacY+/ lacl lacPlacO + lacZ¯lacY- lac lacP + lacO + lacZ + lacY¯/ lacI+ lacP-lacO+ lacZ-lacY+ lacı+ lacP-lacO© lacZ¯lacY+/ lack lacP+ lacO + lacZ + lacY- lacl lacPlacO + lacZ + lacY+/ lacI+ lacP + lacO + lacZ + lacY+ For the Escherichia coli lactose operon genotypes listed, + indicates a functional component, - indicates a nonfunctional component, superscript C indicates a constitutively active component, and superscript S indicates a component that is unresponsive to an inducer. Genotypes written on two lines and separated by a slash represent the bacterial chromosome and an additional circular DNA strand, called a plasmid. For each E. coli strain shown on the table, use a plus sign (+) to indicate the synthesis of ẞ-galactosidase (ẞ-gal) and permease and a minus sign (—) to indicate no synthesis of these proteins. No glucose is present. + Answer Bank
# Genotype of strain 1 lacI + lacPlacO + lacZ + lacY+ 2 lac lacPlacO + lacZ + lacY+ 3 lacI+ lacP + laco C lacZ + lacY+ 4 lac lacPlacO + lacZ + lacy 10 5 lac lacP lacO + lacZ + lacY+ lacl lacPlacO + lacZ-lacY+/ 6 lac lacPlacO + lacZ + lacY- Lactose absent Lactose absent Lactose present Lactose present Permease Rogal Permease 7 8 10 lac lacp+ lacO © lacZ + lacY+/ lacl lacPlacO + lacZ¯lacY- lac lacP + lacO + lacZ + lacY¯/ lacI+ lacP-lacO+ lacZ-lacY+ lacı+ lacP-lacO© lacZ¯lacY+/ lack lacP+ lacO + lacZ + lacY- lacl lacPlacO + lacZ + lacY+/ lacI+ lacP + lacO + lacZ + lacY+ For the Escherichia coli lactose operon genotypes listed, + indicates a functional component, - indicates a nonfunctional component, superscript C indicates a constitutively active component, and superscript S indicates a component that is unresponsive to an inducer. Genotypes written on two lines and separated by a slash represent the bacterial chromosome and an additional circular DNA strand, called a plasmid. For each E. coli strain shown on the table, use a plus sign (+) to indicate the synthesis of ẞ-galactosidase (ẞ-gal) and permease and a minus sign (—) to indicate no synthesis of these proteins. No glucose is present. + Answer Bank
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter17: Bacterial And Viral Genetics
Section: Chapter Questions
Problem 1ITD
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