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Strategies for Enhancement in Food Production · Question 36

AIPMT 2008MCQMedium📈 Topic in 0% papers+4−1
1

Consider the following four measures (i-iv) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common: (i) Spray with Bordeaux mixture (ii) Control of the insect vector of the disease pathogen (iii) Use of only disease-free seeds (iv) Use of varieties resistant to the disease Which two of the above measures can control the disease?

  1. (i) and (ii)
  2. (i) and (iv)
  3. (ii) and (iii)
  4. (iii) and (iv)

Answer

(2) (i) and (iv)

Solution

Bacterial blight is a bacterial disease (caused by Xanthomonas); it is not spread by an insect vector. (ii) is not a control measure.

In an area where the disease is common, the pathogen is already present in the field, so using only disease-free seeds does not by itself control the disease. (iii) is not enough.

Bordeaux mixture is a copper-based spray; copper sprays act on bacteria as well as fungi and protect the foliage from blight. (i) controls the disease.

As per NCERT, growing disease-resistant varieties is the most effective way to control plant diseases (e.g., Pusa Komal, a cowpea variety resistant to bacterial blight). (iv) controls the disease.

Measures (i) and (iv) control the disease.

Answer: (2)

Out of syllabusAIPMT 2008

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2

In cloning of cattle a fertilized egg is taken out of the mother's womb and:

  1. In the eight cell stage the individual cells are separated under electrical field for further development in culture media
  2. The egg is divided into 4 pairs of cells which are implanted into the womb of other cows
  3. In the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cows
  4. From this up to eight identical twins can be produced
Out of syllabusAIPMT 2007
3

Which one of the following is a viral disease of poultry?

  1. Salmonellosis
  2. Newcastle disease
  3. Pasteurellosis
  4. Coryza
Out of syllabusAIPMT 2007
4

In maize, hybrid vigour is exploited by:-

  1. Crossing of two inbred parental lines
  2. Bombarding the seeds with DNA
  3. Harvesting seeds from the most productive plants
  4. Inducing mutations
Out of syllabusAIPMT 2007
5

Crop plants grown in monoculture are-

  1. Characterised by poor root system
  2. Highly prone to pests
  3. Low in yield
  4. Free from intraspecific competition
Out of syllabusAIPMT 2006
6

In Maize, hybrid vigour is exploited by-

  1. Crossing of two inbred parental lines
  2. Inducing mutations
  3. Harvesting seeds from the most productive plants
  4. Bombarding the protoplast with DNA
Out of syllabusAIPMT 2006
7

In order to obtain virus-free plants through tissue culture the best method is-

  1. Anther culture
  2. Protoplast culture
  3. Meristem culture
  4. Embryo rescue
Out of syllabusAIPMT 2006
8

Triticale, the first man-made cereal crop, has been obtained by crossing wheat with

  1. Pearl millet
  2. Sugarcane
  3. Rye
  4. Barley
Out of syllabusAIPMT 2006
9

The world's highly prized wool yielding 'Pashmina' breed is -

  1. Sheep
  2. Goat-sheep cross
  3. Kashmir sheep-Afghan sheep cross
  4. Goat
AIPMT 2005
10

Three crops that contribute maximum to global food grain production are -

  1. Wheat, maize and sorghum
  2. Wheat, rice and barley
  3. Wheat, rice and maize
  4. Rice, maize and sorghum
Out of syllabusAIPMT 2005
11

Which of the following is generally used for induced mutagenesis in crop plants ?

  1. UV (260 nm)
  2. Alpha particles
  3. Gamma rays (from cobalt-60)
  4. X-rays
Out of syllabusAIPMT 2005

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