Biology Acellular Life UHS 2024
PMDC Verified Question 11 of 70
In the life cycle of a bacteriophage, the lysozymes are required in which of the following steps of infection process?
A
Adsorption
B
Genome injection
C
Replication
D
Penetration
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Penetration
Concept:

Bacteriophages must overcome the rigid bacterial cell wall to deliver their genetic material.

Solution:

  • During the penetration step, the bacteriophage must breach the thick peptidoglycan cell wall of the host bacterium.
  • To do this, the phage tail releases the enzyme lysozyme, which digests a small hole in the cell wall, allowing the viral DNA to be injected into the cytoplasm.


Why other options are incorrect:

  • Adsorption: Refers to the initial physical attachment via tail fibers, prior to enzymatic degradation.
  • Replication: Occurs internally using host polymerases.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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