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Strategies for Enhancement in Food Production · Question 37

AIPMT 2007MCQMedium📈 Topic in 25% papers+4−1
1

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

Answer

(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

Solution

In embryo splitting (cloning) of cattle, the fertilised egg is removed at an early stage; at the eight-cell stage the cells are separated and each is cultured in vitro until a small embryo forms.

As per NCERT (MOET), embryos at the 8–32 cell stage are recovered and transferred to surrogate mothers.

The cultured small embryos are implanted into the womb of other cows.

Answer: (3)

Out of syllabusAIPMT 2007

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2

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

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

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
4

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
5

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
6

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
7

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
8

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
9

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
10

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
11

The name of Norman Borlaug is associated with-

  1. Blue Revolution
  2. Yellow Revolution
  3. Green Revolution
  4. White Revolution
Out of syllabusAIPMT 2005

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