Home Biology Biological Classification Kingdom–Plantae, Animalia and Algae Which of the following statements is false a…
Biology Biological Classification Kingdom–Plantae, Animalia and Algae Single Correct MCQ
Published on: August 12, 2026

Which of the following statements is false about viruses

A
Viruses are obligate parasites
B
Viruses can multiply only when they are inside the living cells
C
Viruses cannot pass bacterial proof filters
D
Viruses are made up of protein+ DNA or RNA (nerver both DNA and RNA)

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Text Solution

Verified by Experts
The correct answer is:
C

Statement is false because viruses are significantly smaller than bacteria. Bacteria typically range from 0.5 to 5 micrometers in size, whereas most viruses range from about 20 to 300 nanometers. Consequently, viruses can easily pass through bacterial proof filters (such as porcelain filters), which are designed to trap larger microorganisms like bacteria. This filterability was one of the early defining characteristics used by scientists like Ivanovsky and Beijerinck to distinguish viruses from bacteria.

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