IB Biology Topic A2.3.4 Lysogenic Cycle of a Virus Revision Notes (HL)

IB Biology Topic A2.3.4 Lysogenic Cycle of a Virus Revision Notes (HL) | RevisionDojo

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The Lysogenic Cycle: Viral Dormancy and Integration

Bacteriophage lambda can switch between two distinct life cycles: the lytic cycle and the lysogenic cycle.

The Lysogenic Cycle: Six Steps from Infection to Integration

Step 1: Attachment
1. Bacteriophage λ attaches to E. coli using tail proteins that bind specifically to maltoporin, a protein in the bacterial outer membrane.
Step 2: DNA Entry (Penetration)
1. The phage contracts its tail sheath like a syringe, injecting viral DNA into the bacterial cytoplasm.
2. The viral DNA enters as a linear molecule with sticky ends, which rapidly circularizes inside the host.
3. Only the DNA enters, the capsid remains outside.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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The Lysogenic Cycle: Viral Dormancy and Integration

Bacteriophage lambda can switch between two distinct life cycles: the lytic cycle and the lysogenic cycle.

The Lysogenic Cycle: Six Steps from Infection to Integration

Step 1: Attachment
1. Bacteriophage λ attaches to E. coli using tail proteins that bind specifically to maltoporin, a protein in the bacterial outer membrane.
Step 2: DNA Entry (Penetration)
1. The phage contracts its tail sheath like a syringe, injecting viral DNA into the bacterial cytoplasm.
2. The viral DNA enters as a linear molecule with sticky ends, which rapidly circularizes inside the host.
3. Only the DNA enters, the capsid remains outside.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic A2.3.4: Lysogenic Cycle of a Virus Notes

The Lysogenic Cycle: Viral Dormancy and Integration

The Lysogenic Cycle: Six Steps from Infection to Integration

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

The Lysogenic Cycle: Viral Dormancy and Integration

The Lysogenic Cycle: Six Steps from Infection to Integration

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics