NEET 2017 · BiologyEubacteriaPrevious Year Question
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
Answer: (C) Mycoplasma. Answer: (C) Mycoplasma Solution: Mycoplasma completely lack a cell wall, are the smallest living cells known, can survive without oxygen, and many are pathogenic in both plants and animals.
- A.Bacillus
- B.Pseudomonas
- C.Mycoplasma✓
- D.Nostoc
Correct Answer
(C) Mycoplasma
Solution & Explanation
Answer: (C) Mycoplasma Solution: Mycoplasma completely lack a cell wall, are the smallest living cells known, can survive without oxygen, and many are pathogenic in both plants and animals. Bacillus, Pseudomonas and Nostoc all possess a definite cell wall, so they do not fit the description. NCERT Reference: NCERT Class XI, Biological Classification, p.14, lines 12-15 — "Mycoplasma are organisms that completely lack a cell wall"
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