Biology Acellular Life ETEA 2022
PMDC Verified Question 35 of 70
In \( 1935 \) W. M. Stanley prepared an extract of:
A
Human immunodeficiency virus (HIV)
B
Tobacco mosaic virus (TMV)
C
Flu virus
D
Polio virus
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Tobacco mosaic virus (TMV)
Concept:

The history of virology involves key milestones in isolating and identifying viral structures.

Solution:

  • In \( 1935 \), W.M. Stanley successfully prepared a crystallized extract of the Tobacco Mosaic Virus (TMV).
  • This proved that viruses were particulate in nature and consisted of nucleic acids and proteins.


Why other options are incorrect:

  • HIV, Flu, and Polio: These viruses were not the first to be crystallized; Stanley's pioneering work was specifically on TMV.

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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