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Biological Classification · Question 37

AIPMT 2015MCQEasy📈 Topic in 25% papers+4−1
1

Select the wrong statement.

  1. The term ' contagium vivum fluidum' was coined by M. W. Beijerinck.
  2. Mosaic disease in tobacco and AIDS in human being are caused by viruses.
  3. The viroids were discovered by D.J. Ivanowsky.
  4. W.M. Stanley showed that viruses could be crystallised.

Answer

(3) The viroids were discovered by D.J. Ivanowsky.

Solution

As per NCERT, M.W. Beijerinck (1898) called the fluid ' contagium vivum fluidum' (infectious living fluid). ⇒ (1) is correct.

Tobacco mosaic disease (TMV) and AIDS (HIV) are viral diseases. ⇒ (2) is correct.

W.M. Stanley (1935) showed that viruses could be crystallised. ⇒ (4) is correct.

As per NCERT, viroids were discovered by T.O. Diener (1971); D.J. Ivanowsky (1892) recognised the causal organism of mosaic disease of tobacco (viruses).

∴ Statement (3) is wrong.

Answer: (3)

AIPMT 2015

Keep practising — Biological Classification

2

In which group of organisms the cell walls form two thin overlapping shells which fit together?

  1. Dinoflagellates
  2. Slime moulds
  3. Chrysophytes
  4. Euglenoids
AIPMT 2015
3

Pick up the wrong statement.

  1. Some fungi are edible.
  2. Nuclear membrane is present in Monera.
  3. Cell wall is absent in Animalia.
  4. Protists have photosynthetic and heterotrophic modes of nutrition.
AIPMT 2015
4

Choose the wrong statement.

  1. Morels and truffles are poisonous mushrooms.
  2. Yeast is unicellular and useful in fermentation.
  3. Penicillium is multicellular and produces antibiotics.
  4. Neurospora is used in the study of bio-chemical genetics.
AIPMT 2015
5

Cell wall is absent in

  1. Mycoplasma
  2. Nostoc
  3. Aspergillus
  4. Funaria.
AIPMT 2015
6

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to

  1. Ascomycetes
  2. Phycomycetes
  3. Basidiomycetes
  4. Deuteromycetes
AIPMT 2015
7

True nucleus is absent in

  1. Vaucheria
  2. Volvox
  3. Anabaena
  4. Mucor.
AIPMT 2015 (Cancelled)
8

Which one of the following matches is correct?

  1. Mucor – Reproduction by conjugation – Ascomycetes
  2. Agaricus – Parasitic fungus – Basidiomycetes
  3. Phytophthora – Aseptate mycelium – Basidiomycetes
  4. Alternaria – Sexual reproduction absent – Deuteromycetes
AIPMT 2015 (Cancelled)
9

Five kingdom system of classification suggested by R.H. Whittaker is not based on

  1. presence or absence of a well defined nucleus
  2. mode of reproduction
  3. mode of nutrition
  4. complexity of body organisation.
AIPMT 2014
10

Which of the following shows coiled RNA strand and capsomeres?

  1. Polio virus
  2. Tobacco mosaic virus
  3. Measles virus
  4. Retrovirus
AIPMT 2014
11

Viruses have

  1. DNA enclosed in a protein coat
  2. prokaryotic nucleus
  3. single chromosome
  4. both DNA and RNA.
AIPMT 2014

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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
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