SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is a true statement about viruses?
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They are only spread through person-to-person contact
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They can be spread in a number of different ways
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All of them are harmful to humans
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They can only be spread through exposure to animal waste
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Explanation:
Detailed explanation-1: -All viruses are obligate parasites; that is, they lack metabolic machinery of their own to generate energy or to synthesize proteins, so they depend on host cells to carry out these vital functions.
Detailed explanation-2: -Viruses do not have DNA or RNA.
Detailed explanation-3: -Viruses differ and can be categorized by structure, genome type, host type, and the transmission mechanism.
Detailed explanation-4: -Viruses are acellular biological agents. They do not have cellular structure or organelles. So, they are parasitic in nature and require the cellular machinery of the host cell to replicate.
There is 1 question to complete.