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Microbes in Human Welfare · Question 51

AIPMT 2010 (Prelims)MCQEasy📈 Topic in 0% papers+4−1
1

A common biocontrol agent for the control of plant diseases is –

  1. Bacillus thuringiensis
  2. Trichoderma
  3. Glomus
  4. Baculovirus

Answer

(2) Trichoderma

Solution

As per NCERT, Trichoderma species are free-living fungi, very common in root ecosystems, and are effective biocontrol agents of several plant pathogens.

Bacillus thuringiensis and baculoviruses ( Nucleopolyhedrovirus) are used against insect pests, not plant diseases; Glomus is a mycorrhizal fungus used as a biofertiliser.

Answer: (2)

AIPMT 2010 (Prelims)

Keep practising — Microbes in Human Welfare

2

The common nitrogen-fixer in paddy fields is –

  1. Azospirillum
  2. Frankia
  3. Rhizobium
  4. Oscillatoria
AIPMT 2010 (Prelims)
3

Which one of the following is not used in organic farming ?

  1. Earthworm
  2. Oscillatoria
  3. Snail
  4. Glomus
AIPMT 2010 (Prelims)
4

Which of the following is a symbiotic nitrogen fixer?

  1. Azotobacter
  2. Frankia
  3. Azolla
  4. Glomus
AIPMT 2009
5

Which one of the following pairs is wrongly matched?

  1. Detergents – lipase
  2. Fruit juice – pectinase
  3. Alcohol – nitrogenase
  4. Textile – amylase
AIPMT 2009
6

Which of the following is not used as a biopesticide?

  1. Bacillus thuringiensis
  2. Trichoderma harzianum
  3. Nuclear Polyhedrosis Virus (NPV)
  4. Xanthomonas campestris
AIPMT 2009
7

The bacterium Bacillus thuringiensis is widely used in contemporary biology as -

  1. Indicator of water pollution
  2. Agent for production of dairy products
  3. Source of industrial enzyme
  4. Insecticide
AIPMT 2009
8

Modern detergents contain enzyme preparations of

  1. thermoacidophiles
  2. thermophiles
  3. acidophiles
  4. alkaliphiles
AIPMT 2008
9

Trichoderma harzianum has proved a useful microorganism for:

  1. biological control of soil-borne plant pathogens
  2. reclamation of wastelands
  3. gene transfer in higher plants
  4. bioremediation of contaminated soils
AIPMT 2008
10

Which one of the following proved effective for biological control of nematodal disease in plants?

  1. Pisolithus tinctorius
  2. Paecilomyces lilacinus
  3. Pseudomonas cepacia
  4. Gliocladium virens
AIPMT 2008
11

Probiotics are-

  1. Cancer inducing microbes
  2. New kind of food allergens
  3. Live microbial food supplement
  4. Safe antibiotics
AIPMT 2007

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