| NEET Trap | Wrong Answer (Common Mistake) | Correct Answer | Why Students Get It Wrong |
|---|---|---|---|
| Nucleic acid in viruses | "Viruses contain both DNA and RNA" | Viruses contain EITHER DNA OR RNA — never both | Students confuse virus replication (which involves mRNA) with virus composition |
| Fungi energy storage | "Fungi store starch like plants" | Fungi store glycogen (like animals) | Fungi look plant-like so students assign plant biochemistry |
| Mycoplasma classification | "Mycoplasma is in Protista (eukaryotic)" | Mycoplasma is in Monera (prokaryotic) despite lacking cell wall | Students think cell wall absence = eukaryote |
| Archaebacteria cell wall | "Archaebacteria have peptidoglycan cell walls" | Archaebacteria cell walls lack peptidoglycan | Students generalise "bacteria = peptidoglycan" without distinguishing Archaea |
| Cyanobacteria kingdom | "Cyanobacteria (blue-green algae) belong to Protista or Plantae" | Cyanobacteria are prokaryotes in Monera | Historical name "blue-green algae" misleads into plant kingdom thinking |
| Euglena cell wall | "Euglena has a cellulose cell wall" | Euglena has a proteinaceous pellicle — not a true cell wall | Euglena is photosynthetic, so students assume plant-type cell wall |
| Viroid vs Virus size | "Viroids are larger than viruses" | Viroids are smaller than viruses | Students assume more complex = larger |
| Prion composition | "Prions contain RNA as nucleic acid" | Prions are infectious proteins only — NO nucleic acid | "Infectious agent" implies nucleic acid to most students |
| Lichen bioindicator | "Lichens are indicators of water pollution" | Lichens indicate air pollution ( sensitivity) | Students confuse type of pollution |
| Diatom cell wall | "Diatom cell walls are made of cellulose" | Diatom cell walls are made of silica () — called frustules | Students generalise "algae = cellulose" |
| Diatomaceous earth formation | "Diatomaceous earth is formed by volcanic ash" | Formed by accumulated siliceous frustules of dead diatoms | Unfamiliar with the specific geological process |
| Slime mould vs malaria Plasmodium | "Plasmodium (slime mould genus) causes malaria" | Malaria is caused by Plasmodium (protozoan — Sporozoa); Physarum is the slime mould | Same genus name in two different contexts — classic NEET confusion |
| Deuteromycetes reproduction | "Deuteromycetes produce basidiospores" | Deuteromycetes produce only conidia (no sexual stage known) | Students mix up fungal classes and spore types |
| Heterocyst organism | "Heterocysts are found in all bacteria" | Heterocysts found only in cyanobacteria (Nostoc, Anabaena) | Overgeneralisation |
Part of CL-01 — Biological Classification
Error Analysis — NEET Traps in Biological Classification
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