OVERVIEW OF THE IMMUNE SYSTEM
IMMUNITY INNATE AND ADAPTIVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are too small.
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A virus is a living organism.
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They need a host to reproduce.
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Viruses do not have DNA/genetic material.
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Detailed explanation-1: -Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
Detailed explanation-2: -A virus is a biological agent that reproduces inside the cells of living hosts. They are considered to be living because they can reproduce, and are considered to be non-living because without a host cell they show no signs of life.
Detailed explanation-3: -Viruses lack cellular machinery and hence do not show any characteristics of life until they enter a living body/host and use the host cell to multiply.
Detailed explanation-4: -Most notably, viruses differ from living organisms in that they cannot generate ATP. Viruses also do not possess the necessary machinery for translation, as mentioned above. They do not possess ribosomes and cannot independently form proteins from molecules of messenger RNA.