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NEET UG Biological Classification — practice questions

Explore 16 free Biological Classification questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biological Classification questions and exercises with answers

Showing questions 1–16 of 16.

Which substance is embedded in the cell walls of diatoms, making them nearly indestructible?Read the answer and worked solution →Which dinoflagellate is known for multiplying rapidly to cause red tides in the sea?Read the answer and worked solution →In euglenoids, what replaces the cell wall and keeps the body flexible?Read the answer and worked solution →Under suitable conditions, slime moulds form an aggregation called aRead the answer and worked solution →In Paramoecium, coordinated beating of cilia steers food-laden water into theRead the answer and worked solution →In ascomycetes, conidia are produced exogenously on special hyphae calledRead the answer and worked solution →After karyogamy and meiosis in a basidium, how many basidiospores are usually formed?Read the answer and worked solution →Puccinia, a basidiomycete, is commonly known as aRead the answer and worked solution →Which of these fungi belongs to the deuteromycetes or imperfect fungi?Read the answer and worked solution →In a lichen, what is the algal partner called?Read the answer and worked solution →Bacteriophages are usually viruses with which genetic material?Read the answer and worked solution →Methanogens that produce methane from dung live in the gut ofRead the answer and worked solution →In Nostoc and Anabaena, atmospheric nitrogen is fixed in specialised cells calledRead the answer and worked solution →Prions, which cause mad cow disease, are infectious agents made ofRead the answer and worked solution →When deprived of sunlight, how does Euglena obtain its food?Read the answer and worked solution →The ability of archaebacteria to survive extreme conditions is linked to theirRead the answer and worked solution →

Worked practice questions

Which substance is embedded in the cell walls of diatoms, making them nearly indestructible?

  1. Silica
  2. Lignin
  3. Pectin
  4. Chitin
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Correct answer: A. Silica

Diatom walls are impregnated with silica, which is why their deposits persist as diatomaceous earth.

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Which dinoflagellate is known for multiplying rapidly to cause red tides in the sea?

  1. Plasmodium
  2. Euglena
  3. Trypanosoma
  4. Gonyaulax
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Correct answer: D. Gonyaulax

Red dinoflagellates such as Gonyaulax multiply so fast that the sea turns red.

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In euglenoids, what replaces the cell wall and keeps the body flexible?

  1. A protein-rich pellicle
  2. A rigid cellulose plate
  3. An outer silica shell
  4. A tough chitin coat
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Correct answer: A. A protein-rich pellicle

Euglenoids lack a cell wall and instead have a protein-rich pellicle that lets the body bend.

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More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationPrinciples of Inheritance and VariationAnimal Kingdom