Question

Acellular microorganism is:

• A. Bacteria
• B. Virus
• C. Protozoa
• D. None of the above

Hint:

Viruses are called: \[ \boxed{\text{Acellular infectious agents}} \] They remain inert outside the host cell and replicate only inside living host cells. Remember: \[ \text{Bacteria} \rightarrow \text{Cellular} \] \[ \text{Protozoa} \rightarrow \text{Cellular} \] \[ \text{Virus} \rightarrow \text{Acellular} \]

Answer 1

The Correct Option is B

Step 1: Understand the term acellular. Acellular organisms are entities that do not possess a cellular structure. They lack:
• Cell membrane
• Cytoplasm
• Cellular organelles

Step 2: Examine the given options.
• Bacteria are unicellular prokaryotic organisms. \(\times\)
• Protozoa are unicellular eukaryotic organisms. \(\times\)
• Viruses are acellular infectious particles consisting of nucleic acid enclosed within a protein coat. \(\checkmark\)

Step 3: Identify the correct answer. Since viruses do not possess a cellular organization, \[ \boxed{\text{Virus}} \] is the only acellular microorganism among the given options. Therefore, \[ \boxed{\text{(B)}} \] is the correct answer.