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Biological Classification · Question 110

AIPMT 2001MCQEasy📈 Topic in 25% papers+4−1
1

What is true for cyanobacteria?

  1. Oxygenic with nitrogenase
  2. Oxygenic without nitrogenase
  3. Non-oxygenic with nitrogenase
  4. Non-oxygenic without nitrogenase

Answer

(1) Oxygenic with nitrogenase

Solution

As per NCERT, cyanobacteria (blue-green algae) have chlorophyll a similar to green plants and are photosynthetic autotrophs ⇒ they carry out oxygenic photosynthesis (water is the electron donor and O2 is released).

Some of them, e.g. Nostoc and Anabaena, can fix atmospheric nitrogen in specialised cells called heterocysts, which contain the enzyme nitrogenase.

∴ Cyanobacteria are oxygenic and possess nitrogenase.

Answer: (1)

AIPMT 2001

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2

What is true for archaebacteria?

  1. All halophiles
  2. All photosynthetics
  3. All fossils
  4. Oldest living beings
AIPMT 2001
3

Adhesive pad of fungi penetrates the host with the help of

  1. mechanical pressure and enzymes
  2. hooks and suckers
  3. softening by enzymes
  4. only by mechanical pressure
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4

What is true for photolithotrophs?

  1. Obtain energy from radiations and hydrogen from organic compounds
  2. Obtain energy from radiations and hydrogen from inorganic compounds
  3. Obtain energy from organic compounds
  4. Obtain energy from inorganic compounds
AIPMT 2001
5

Black rust of wheat is caused by

  1. Puccinia
  2. Ustilago
  3. Albugo
  4. Phytophthora.
AIPMT 2000
6

Enzymes are not found in

  1. fungi
  2. algae
  3. virus
  4. cyanobacteria.
AIPMT 2000
7

Which disease of man is similar to cattle's bovine spongiform encephalopathy?

  1. Spongiocitis of cerebrum
  2. Encephalitis
  3. Spondylitis
  4. Jakob–Creutzfeldt disease
AIPMT 2000

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)