One of the following statement is not true of viruses
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Correct Answer: Option C
Explanation:
Viruses are much smaller than bacteria and cannot be seen with an ordinary light microscope. They require an electron microscope for visualization due to their extremely small size (typically ranging from 20 to 300 nanometers).
Here’s why the other statements are true:
A. They are micro-organisms – Viruses are considered microorganisms, but they are unique because they cannot carry out life processes without a host cell.
B. They are smaller than bacteria – Viruses are indeed much smaller than bacteria.
D. They cause tobacco disease – Viruses, such as the tobacco mosaic virus, are responsible for diseases like tobacco mosaic disease.
E. They cause polio and smallpox – Polio and smallpox are caused by viruses (poliovirus and variola virus, respectively).
Viruses are much smaller than bacteria and cannot be seen with an ordinary light microscope. They require an electron microscope for visualization due to their extremely small size (typically ranging from 20 to 300 nanometers).
Here’s why the other statements are true:
A. They are micro-organisms – Viruses are considered microorganisms, but they are unique because they cannot carry out life processes without a host cell.
B. They are smaller than bacteria – Viruses are indeed much smaller than bacteria.
D. They cause tobacco disease – Viruses, such as the tobacco mosaic virus, are responsible for diseases like tobacco mosaic disease.
E. They cause polio and smallpox – Polio and smallpox are caused by viruses (poliovirus and variola virus, respectively).