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Biological Classification

AIPMT 2007MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2007

Which one of the following statements about Mycoplasma is wrong?

  1. They are pleomorphic.
  2. They are sensitive to penicillin.
  3. They cause diseases in plants.
  4. They are also called PPLO.

Answer

(2) They are sensitive to penicillin.

Solution

As per NCERT, Mycoplasma are organisms that completely lack a cell wall; they are the smallest living cells known and can survive without oxygen.

∵ No cell wall ⇒ they have no fixed shape, i.e. they are pleomorphic ⇒ (1) is correct.

∵ Penicillin acts by blocking cell-wall (peptidoglycan) synthesis ⇒ organisms without a cell wall are resistant (insensitive) to penicillin ⇒ statement (2) is wrong.

∵ Many Mycoplasma are pathogenic in animals and plants (e.g. little leaf of brinjal), and they are also called PPLO (pleuropneumonia-like organisms) ⇒ (3) and (4) are correct.

Answer: (2)

Keep practising — Biological Classification

Ques. 2AIPMT 2007

Which pair of the following belongs to basidiomycetes?

  1. Puffballs and Claviceps
  2. Peziza and stinkhorns
  3. Morchella and mushrooms
  4. Bird's nest fungi and puffballs
Ques. 3AIPMT 2006

Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread? Choose the answer from the following options.

  1. B, C and F only
  2. A, C and E only
  3. A, D and E only
  4. B, D and E only
Ques. 4AIPMT 2006

What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

  1. These are all parasites
  2. These are all unicellular protists
  3. They have flagella
  4. They produce spores
Ques. 5AIPMT 2006

The causative agent of mad-cow disease is a-

  1. Virus
  2. Bacterium
  3. Prion
  4. Worm
Ques. 6AIPMT 2006

The bacterium ( Clostridium botulinum) that causes botulism is-

  1. A facultative aerobe
  2. An obligate aerobe
  3. A facultative anaerobe
  4. An obligate anaerobe
Ques. 7AIPMT 2005

Barophilic prokaryotes

  1. grow and multiply in very deep marine sediments
  2. occur in water containing high concentrations of barium hydroxide
  3. readily grow and divide in sea water enriched in any soluble salt of barium
  4. grow slowly in highly alkaline frozen lakes at high altitudes.
Ques. 8AIPMT 2005

There exists a close association between the alga and the fungus within a lichen. The fungus

  1. provides protection, anchorage and absorption for the alga
  2. provides food for the alga
  3. fixes the atmospheric nitrogen for the alga
  4. releases oxygen for the alga
Ques. 9AIPMT 2005

Auxospores and hormogonia are formed, respectively, by

  1. some diatoms and several cyanobacteria
  2. some cyanobacteria and many diatoms
  3. several cyanobacteria and several diatoms
  4. several diatoms and a few cyanobacteria.
Ques. 10AIPMT 2005

Match items in column I with those in column II. Select the correct answer from the following.

  1. (A) - (L); (B) - (J); (C) - (M); (D) - (N); (E) - (K)
  2. (A) - (K); (B) - (J); (C) - (L); (D) - (M); (E) - (N)
  3. (A) - (N); (B) - (L); (C) - (K); (D) - (N); (E) - (J)
  4. (A) - (J); (B) - (K); (C) - (N); (D) - (L); (E) - (K)
Ques. 11AIPMT 2005

Which of the following unicellular organisms has a macronucleus for trophic function and one or more micronuclei for reproduction?

  1. Euglena
  2. Amoeba
  3. Paramecium
  4. Trypanosoma

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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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