Q. No.In order to obtain virus-free plants through tissue culture the best method is
1. protoplast culture
2. embryo rescue
3. anther culture
4. meristem culture
1. protoplast culture
2. embryo rescue
3. anther culture
4. meristem culture
In maize, hybrid vigor is exploited by
1. bombarding the protoplast with DNA
2. crossing of two inbred parental lines
3. harvesting seeds from the most productive plants
4. inducing mutations
In the cloning of cattle, a fertilized egg is taken out of the mother’s womb and:
| 1. | From this up to eight identical twins can be produced |
| 2. | The egg is divided into four pairs of cells that 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. | In the eight-cell stage, the individual cells are separated under the electrical field for further development in culture media. |
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Which one of the following is a viral disease of poultry?
1. Pasteurellosis
2. Salmonellosis
3. Coryza
4. New castle disease
Probiotics are
1. live microbial food supplement
2. safe antibiotics
3. cancer-inducing microbes
4. new kind of food allergens
Consider the following four measures (a-d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common
a. Spray with Bordeaux mixture
b. Control of insect vector of the disease pathogen
c. Use of only disease-free seeds
d. Use of varieties resistant to the disease
Which two of the above measures can control the disease?
1. (a) and (d)
2. (b) and (c)
3. (a) and (b)
4. (c) and (d)
Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
1. Black rust of wheat
2. Bacterial leaf blight of rice
3. Downy mildew of grapes
4. Loose smut of wheat
Somaclones are obtained by
1. Genetic engineering
2. Tissue culture
3. Plant breeding
4. Irradiation
Breeding of crops with high levels of minerals, vitamins and proteins is called
1. Micropropagation
2. Somatic hybridization
3. Biofortification
4. Biomagnifications
Himgiri developed by hybridization, and selection for disease resistance against rust pathogens, is a variety of:
| 1. | Wheat | 2. | Chilli |
| 3. | Maize | 4. | Sugarcane |
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