Bacteria with a lac phenotype are unable to use lactose because of some defect in expressing the genes A constitutive Lac+ phenotype could mean either that the production of repressor is defective or that the operator sequence is defective The lacl gene is next to, but is not part of, the lac operon Bacteria with a lac* phenotype cannot grow on media containing lactose as the only sugar The structural genes of the lac operon are each transcribed as a separate MRNA
Bacteria with a lac phenotype are unable to use lactose because of some defect in expressing the genes A constitutive Lac+ phenotype could mean either that the production of repressor is defective or that the operator sequence is defective The lacl gene is next to, but is not part of, the lac operon Bacteria with a lac* phenotype cannot grow on media containing lactose as the only sugar The structural genes of the lac operon are each transcribed as a separate MRNA
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Indicate whether each of the following statements about the lac operon are true or
false:
Bacteria with a lac
phenotype are unable to
use lactose because of
some defect in expressing
the genes
A constitutive Lac+
phenotype could mean
either that the production
of repressor is defective or
that the operator sequence
is defective
The lacl gene is next to, but
is not part of, the lac
1. TRUE
operon
2. FALSE
Bacteria with a lac*
phenotype cannot grow on
media containing lactose as
the only sugar
The structural genes of the
lac operon are each
transcribed as a separate
MRNA
Expression of the Lac
Repressor from
the lacl promoter is
regulated by lactose
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