Which of the following is not considered a microorganism?
Alga
Bacterium
Protozoan
Flea
The Correct Answer is D
A. Alga: Many algae are microscopic (microalgae) and are considered microorganisms.
B. Bacterium: Bacteria are classic microorganisms.
C. Protozoan: Protozoa are single-celled eukaryotes and are microorganisms.
D. Flea: Fleas are multicellular arthropods visible to the naked eye and are not classified as microorganisms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Mycoplasma: Mycoplasma (especially Mycoplasma pneumoniae) is the usual cause of atypical or “walking” pneumonia.
B. Corynebacterium: Corynebacterium diphtheriae causes diphtheria rather than walking pneumonia.
C. Streptococcus pneumonia: Streptococcus pneumoniae commonly causes typical lobar pneumonia, often more severe than walking pneumonia.
D. Aemophilus: (Likely intended Haemophilus) Haemophilus species can cause respiratory infections but are not the classic cause of walking pneumonia.
Correct Answer is B
Explanation
A. Collar: T-even bacteriophages (e.g., T4) have a collar/neck region between the head and tail.
B. Spores: Spores are produced by bacteria (endospores) or fungi, not part of a bacteriophage’s anatomy.
C. Tail pins: T-even phages have a baseplate with tail pins/spikes used for attachment.
D. None of the above: This option does not apply because spores are not part of a bacteriophage.
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