While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant:

  • Bagging of female flower

  • Dusting of pollen on stigma

  • Emasculation

  • Collection of pollen

Polyethene glycol method is used for

  • gene transfer without a vector

  • biodiesel production

  • seedless fruit production

  • energy production from sewage

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

  •   Bacterial leaf blight of rice

  •   Downy mildew of grapes

  •   Loose smut of wheat

  •   Black rust of wheat

Bacterial leaf blight of rice is caused by a species of

  •   Xanthomonas

  •   Pseudomonas

  •   Alternaria

  •   Erwinia

Haploids are more suitable for mutation studies than the diploids. This is because

  •   haploids are reproductively more stable than diploids

  •   mutagens penetrate in haploids more effectively than in diploids

  •   haploids are more abundant in nature than diploids

  •   all mutations, whether dominant or recessive are expressed in haploids

Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?

  • Euphorbia

  • Beetroot

  • Sugarcane

  • Pongamia

Crop plants grown in monoculture are

  • low in yield

  • free from intraspecific competition

  • characterized by poor root system

  • highly prone to pests

In maize, hybrid vigour is exploited by :

  • bombarding the protoplast with DNA

  • crossing of two inbreed parental lines

  • harvesting seeds from the most productive plants

  • inducing mutations

Select the incorrect statement

  • Inbreeding helps in the accumulation of superior genes and the elimination of undesirable genes

  • Inbreeding increases homozygosity

  • Inbreeding is essential to evolve purelines in any animal

  • Inbreeding selects harmful recessive genes that reduce fertility and productivity

Select the incorrect statement regarding inbreeding:

  •  Inbreeding helps in elimination of deleterious alleles from the population

  • Inbreeding is necessary to evolve a pure-line in any animal

  •  Continued inbreeding reduces fertility and leads to inbreeding depression.

  •  Inbreeding depression cannot be overcome by out-crossing.

By which method was a new breed 'Hisardale' of sheep found by using Bikaneri ewes and Marina rams?

  •  Mutational breeding

  • Cross breeding

  • Inbreeding

  • Out crossing

Inbreeding depression is -

  • Reduced motility and immunity due to close inbreeding

  • Decreased productivity due to mating of superior male and inferior female

  • Decrease in body mass of progeny due to continued close inbreeding

  • Reduced fertility and productivity due to continued close inbreeding

Match List - I with List - II

 List - I List - II
 (a) Protoplast fusion (i) Totipotency
 (b) Plant tissue culture (ii) Pomato
 (c) Meristem culture (iii) Somaclones
 (d) Micropropagation (iv) Virus free plants

Choose the correct answer from the options given below.

       (a)       (b)       (c)      (d)

  •   (iii)       (iv)       (i)       (ii)

  •   (iv)       (iii)       (ii)      (i)

  •   (iii)        (iv)      (ii)      (i)

  •   (ii)         (i)        (iv)     (iii)

Mutations in plant cells can be induced by:

  • Gamma rays

  • Zeatin

  • Kinetin

  • Infrared rays

Which of the following is not an objective of Biofortification in crops?

  • Improve vitamin content 

  • Improve micronutrient and mineral content

  • Improve protein content

  • Improve resistance to diseases 

Which of the following is not a step in Multiple Ovulation Embryo Transfer Technology (MOET)?

  • Cow is fertilized by artificial insemination

  • Fertilized eggs are transferred to surrogate mothers at 8-32 cell stage

  • Cow is administered hormone having LH like activity for super ovulation

  • Cow yields about 6-8 eggs at a time

Identify the incorrectly matched row:
Variety Crop Resistant to
1. Himgiri Wheat Leaf and stripe rust
2. Pusa sadabahar Chilli Chilli mosaic virus
3. Pusa Komal Flat bean Bacterial blight
4. Pusa sawani Okra Shoot and fruit borer

 
  • 1
  • 2
  • 3
  • 4
It is possible to obtain virus-free plants from virus-infected plants using the technique of:
 
  • Embryo rescue
  • Meristem culture
  • Biofortification
  • Phytoremediation
Identify the correct statements:
I. Kalyan sona and Sonalika are semi-dwarf varieties of wheat.
II. Jaya and Ratna are varieties of rice developed in India.
III. Saccharum barberi had thicker stems and higher sugar content and did not grow well in North India
 
  • Only II
  • Only I and II
  • Only II and III
  • Only I and III
Somaclonal variation is the variation seen in plants that have been produced by:
 
  • Classical hybridization
  • Mutation breeding
  • Plant tissue culture
  • Genetic engineering
Arrange the steps of somatic hybridization in correct chronological order:
I. Protoplast fusion using electric shock (electrofusion) or chemical treatment.
II. The removal of the cell wall of one cell of each type of plant using cellulase enzyme to produce a somatic cell called a protoplast
III. The formation of the cell wall induced using hormones
IV. The cells are then grown into calluses which then are further grown to plantlets and finally to a full plant, known as a somatic hybrid.
 
  • I → II → III → IV
  • I → II → IV → III
  • II → I → III → IV
  • II → I → IV → III
Mutation breeding has been used to create:
I. Mung bean variety resistant to yellow mosaic virus
II. Abelmoschus variety resistant to yellow mosaic virus
 
  • Only I
  • Only II
  • Both I and II
  • Neither I nor II
Quality protein maize (QPM) is a family of maize varieties. QPM grain contains nearly twice as much amino acids that are limiting amino acids in grains. These amino acids are:
 
  • Lysine and tryptophan
  • Methionine and cysteine
  • Glutamic acid and aspartic acid
  • Threonine and tyrosine
During organogenesis in plant tissue culture:
 
  •     an excess of auxin will often result in a proliferation of roots, while an excess of cytokinin yield shoots
  •     an excess of auxin will often result in a proliferation of roots, while an excess of gibberellins  yield shoots
  •     an excess of cytokinin will often result in a proliferation of roots, while an excess of gibberellins  yield shoots
  •     an excess of gibberellins will often result in a proliferation of roots, while an excess of ethylene  yield shoots
Plant tissue culture may offer certain advantages over traditional methods of propagation, including all the following except:
 
  •     The production of plants that exhibit large variations from the parent plants.
  •     Quickly production of mature plants.
  •     The regeneration of whole plants from plant cells that have been genetically modified.
  •     Storage of genetic plant material to safeguard native plant species.
The controlled cultivation of aquatic organisms such as fish, crustaceans, mollusks, algae and other organisms of value such as aquatic plants is known as:
 
  •     Fisheries
  •     Aquaculture
  •     Pisciculture
  •     Commercial fishing
The predominant honeybee found and most commonly domesticated in India is:
 
  •     Apis cerana indica
  •     Apis mellifera
  •     Apis dorsata
  •     Apis florea
What is incorrect regarding Multiple Ovulation Embryo Transfer technology used in cattle breeding?
 
  •     Hormone with FSH like activity is used to induce super ovulation
  •     The cow is mated with an elite bull or artificially inseminated
  •     Fertilized eggs are recovered surgically at 4-8 cell stage
  •     The proembryos are transferred to surrogate mothers
Out-crossing:
I.    is the best breeding method for animals that are below average in productivity in milk production, growth rate and beef cattle.
II.    helps to overcome inbreeding depression
 
  •     Only I is correct
  •     Only II is correct
  •     Both I and II are correct
  •     Both I and II are incorrect
Consider the two statements:
I.    Inbreeding is necessary if we want to evolve a pureline in any animal.
II.    Continued inbreeding often results in reduced fertility and productivity.
 
  •     Both I and II are correct and II explains I
  •     Both I and II are correct but II does not explain I
  •     I is correct but II is incorrect
  •     Both I and II are incorrect
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