Question:

Which of the following is not a prokaryote?

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Prokaryotes include: Bacteria Cyanobacteria (blue green algae) Mycoplasma Fungi are always eukaryotic.
Updated On: Jun 21, 2026
  • Fungi
  • Bacteria
  • Blue green algae
  • Mycoplasma
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The Correct Option is A

Solution and Explanation

Concept: Living organisms are divided into prokaryotic and eukaryotic organisms based on cellular organization. Prokaryotic organisms lack a true nucleus and membrane-bound organelles. Eukaryotic organisms possess a true nucleus and organized membrane-bound cell structures. To solve this question, we must identify which organism belongs to eukaryotes.

Step 1: Understand characteristics of prokaryotes.
Prokaryotes possess No true nucleus No membrane-bound organelles Circular DNA Simple cell organization Examples include bacteria, cyanobacteria and mycoplasma.

Step 2: Check bacteria and blue green algae.
Bacteria are classical prokaryotic organisms. Blue green algae are cyanobacteria. Cyanobacteria also lack true nucleus. Thus both are prokaryotes.

Step 3: Check mycoplasma.
Mycoplasma are smallest living cells. They lack cell wall but are still prokaryotic organisms. Hence they are prokaryotes.

Step 4: Check fungi.
Fungi possess True nucleus Membrane-bound organelles Complex cell organization Thus fungi are eukaryotic organisms. Hence fungi are not prokaryotes. Therefore answer is \[ \boxed{\text{Option (1)}} \]
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