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Which of the following is not a prokaryote?
Kingdom Monera = Prokaryotes; Kingdom Fungi = EUKARYOTES!
Prokaryotes lack a membrane-delimited nucleus (their genetic material is an unclad circular naked DNA nucleoid) and lack membrane-bound cytoplasmic organelles (mitochondria, chloroplasts, Golgi, ER). In contrast, eukaryotes possess a double-membraned nucleus and compartmentalized membrane-bound organelles.
Bacteria, Blue-green algae (cyanobacteria, like Nostoc and Anabaena), and Mycoplasma (PPLO) are all definitive members of Kingdom Monera and are typical prokaryotic organisms.
Fungi (e.g. Yeast, Rhizopus, Agaricus) constitute a separate eukaryotic kingdom of heterotrophic organisms characterized by chitinous cell walls, true nuclei, linear chromatin organized with histones, and 80S cytosolic ribosomes.
Diagnose every choice: Know exactly why the right option works and why distractors fail.
Incorrect. Bacteria are the classic representative prokaryotes (Kingdom Monera).
Incorrect. Blue-green algae are cyanobacteria (photosynthetic prokaryotes with 70S ribosomes and peptidoglycan cell walls).
Incorrect. Mycoplasma are the smallest living prokaryotes, lacking a cell wall.
100% accurate. Fungi are eukaryotic organisms possessing true nuclei and membrane-bound organelles.
Students often assume "Blue green algae" are eukaryotic algae like Spirogyra. Blue-green algae are actually Cyanobacteria, which are strictly PROKARYOTES!
"Prokaryotes encompass bacteria, blue-green algae, mycoplasma, and PPLO. Fungi are eukaryotes."
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