NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they are visible with a light microscope.
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they are the smallest known cells.
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they are composed of protein only.
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they are typically about the size of prokaryotic cells.
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they are acellular obligatory parasites.
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Detailed explanation-1: -Which of the following is an accurate description of viruses? they are acellular obligatory parasites.
Detailed explanation-2: -Viruses are small and relatively simple microbes that cannot grow outside of living cells, that is, they are obligate intracellular parasites (Figure 1).
Detailed explanation-3: -Viruses use the machinery of the host cells to reproduce. They do not have cell organelles such as Golgi complex, mitochondria, lysosomes, ribosomes etc. hence, they cannot reproduce or live separately. Therefore they are called obligatory intercellular parasites.
Detailed explanation-4: -viruses. 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.