OR3 OR2 ORI Рам Pa During the lysogenic cycle, the a repressor controls the switch. During the lytic cycle, the cro protein controls the switch. cro proteln binds to Oga- The a repressor binds to OR FA repressor cro proteln OR OR3 On2 PR ORI Og3 Or2 PR PaM Off The A repressor binds to Orz and then to Og3 cro proteln binds to OR2 and Our OR3 OR2 ORI Ora Orz ORI PeM The amount of the a repressor falls, because cll Is not activating P The a repressor Is released from Og3- Lytic cycle occurs Рам FIGURE 18.11 The Og operator, the genetic switch bet ween the lysogen ic and lytic cycles. Lysogenic cycle occurs CONCEPT CHECK: What environmental conditions favor a switch to the lytic cycl in in
OR3 OR2 ORI Рам Pa During the lysogenic cycle, the a repressor controls the switch. During the lytic cycle, the cro protein controls the switch. cro proteln binds to Oga- The a repressor binds to OR FA repressor cro proteln OR OR3 On2 PR ORI Og3 Or2 PR PaM Off The A repressor binds to Orz and then to Og3 cro proteln binds to OR2 and Our OR3 OR2 ORI Ora Orz ORI PeM The amount of the a repressor falls, because cll Is not activating P The a repressor Is released from Og3- Lytic cycle occurs Рам FIGURE 18.11 The Og operator, the genetic switch bet ween the lysogen ic and lytic cycles. Lysogenic cycle occurs CONCEPT CHECK: What environmental conditions favor a switch to the lytic cycl in in
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter7: Gene Expression And Control
Section: Chapter Questions
Problem 15SQ
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What environmental conditions favor a switch to the lytic cycle?
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