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IB Biology HL A2.3.3 Hl Lytic Cycle Questions

Follow the lytic cycle of lambda phage in E. coli: attachment and injection of double-stranded DNA, degradation of host DNA, production and assembly of viral parts using host machinery, then release by host-cell lysis.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Describe lambda phage attaching to E. coli and injecting double-stranded DNA.
  • Explain that viral DNA remains separate, host DNA is degraded and host machinery produces viral parts.
  • Describe assembly of new phages and their release by lysis of the host cell.

IB Biology HL A2.3.3 Hl Lytic Cycle Questions question 1

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The micrograph is an image of human cheek cells viewed with a light microscope.

Figure for Question IB Biology HL A2.3.3 Hl Lytic Cycle Questions question 1 — IB Biology HL

Viruses depend on living cells to reproduce. Compare and contrast the lysogenic and lytic cycles of the bacteriophage lambda.

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