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Biological Classification : Class-XI


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NEET PYQs on Biological Classification : Class-XI


[class-xi ]

  • Bacteria are exclusively heterotrophic organisms.
  • Slime moulds are saprophytic organisms classified under Kingdom Monera.
  • Mycoplasma have DNA, Ribosome and cell wall
  • Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera.
    • Correct Option: D  [ Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera. ]

    Remark:

Which of the following statements is correct?

[class-xi ]

  • Fusion of two cells is called Karyogamy.
  • Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
  • Organisms that depend on living plants are called saprophytes.
  • Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
    • Correct Option: B  [ Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy. ]

    Remark:

Which of the following is incorrect about Cynobacteria?

[class-xi ]

  • They are photoautotrophs
  • They lack heterocysts
  • They often form blooms in polluted water bodies
  • They have chlorophyll A similar to green plants
    • Correct Option: B  [ They lack heterocysts ]

    Remark:

The size of Pleuropneumonia - like Organism (PPLO) is:

[class-xi ]

  • 0.02 µm
  • 1-2 µm
  • 10-20 µm
  • 0.1 µm
    • Correct Option: D  [ 0.1 µm ]

    Remark:

Which of the following statements about inclusion bodies is incorrect ?

[class-xi ]

  • They are not bound by any membrane.
  • These are involved in ingestion of food particles.
  • They lie free in the cytoplasm.
  • These represent reserve material in cytoplasm.
    • Correct Option: B  [ These are involved in ingestion of food particles. ]

    Remark:

Which of the following is correct about viroids?

[class-xi ]

  • They have RNA with protein coat.
  • They have free RNA without protein coat.
  • They have DNA with protein coat.
  • They have free DNA without protein coat.
    • Correct Option: B  [ They have free RNA without protein coat. ]

    Remark:

Which of the following statements is incorrect ?

[class-xi ]

  • Viroids lack a protein coat
  • Infective constituent in viruses is the protein coat
  • Viruses are obligate parasites
  • Prions consist of abnormally folded proteins
    • Correct Option: B  [ Infective constituent in viruses is the protein coat ]

    Remark:

Which one of the following is not a criterion for classification of fungi?

[class-xi ]

  • Mode of spore formation
  • Fruiting body
  • Mode of nutrition
  • Morphology of mycelium
    • Correct Option: C  [ Mode of nutrition ]

    Remark:

Match List I with List II

List-I List-II
A. Rhizopus I. Mushroom
B. Ustilago II. Smut fungus
C. Puccinia III. Bread mould
D. Agaricus IV. Rust fungus

Choose the correct answer from the options given below:

[class-xi ]

  • A-I, B-III, C-II, D-IV
  • A-III, B-II, C-IV, D-I
  • A-IV, B-III, C-II, D-I
  • A-III, B-II, C-I, D-IV
    • Correct Option: B  [ A-III, B-II, C-IV, D-I ]

    Remark: Explanation:
    NCERT Page No. 16, 17 and 18
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NEET Biology Previous Year Questions (PYQs)