NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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chlamydias
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prions and viroids
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rickettsias
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cyanobacteria
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Detailed explanation-1: -Viroids are smaller than viruses. Prions are smaller than the viroids. Viroids are composed of single strands of RNA. Prions are composed of only protein molecules.
Detailed explanation-2: -viroid, an infectious particle smaller than any of the known viruses, an agent of certain plant diseases. The particle consists only of an extremely small circular RNA (ribonucleic acid) molecule, lacking the protein coat of a virus.
Detailed explanation-3: -Where a virus such as SARS-CoV-2 is made up of nearly 30, 000 nucleotides-the basic building blocks of DNA and RNA-viroids only contain between 220 to 450 nucleotides. This is more than five times smaller than the smallest known virus.
Detailed explanation-4: -Prion: A small proteinaceous infectious disease-causing agent that is believed to be the smallest infectious particle.