P₁0 ORF1 t₁ ORF2 ORF3 t₂ The diagram above illustrates an operon that is regulated by the RepR protein. A small molecule, X, is needed to enable RepR to

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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P₁0
ORF1 t₁
ORF2
ORF3 t₂
The diagram above illustrates an operon that is
regulated by the RepR protein.
O
A small molecule, X, is needed to enable RepR to
bind to the operator (O).
When X is absent, which of the following
statements is most accurate?
O
RNA polymerase binding to the P₁ promoter
is unblocked
Equal amounts of ORF1, ORF2, and ORF3
are made
Expression of ORF2 and ORF3 is prevented
by the terminator t₁
O Expression of ORF1, ORF2, and ORF3 is de-
repressed
Transcribed Image Text:P₁0 ORF1 t₁ ORF2 ORF3 t₂ The diagram above illustrates an operon that is regulated by the RepR protein. O A small molecule, X, is needed to enable RepR to bind to the operator (O). When X is absent, which of the following statements is most accurate? O RNA polymerase binding to the P₁ promoter is unblocked Equal amounts of ORF1, ORF2, and ORF3 are made Expression of ORF2 and ORF3 is prevented by the terminator t₁ O Expression of ORF1, ORF2, and ORF3 is de- repressed
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