Crop Improvement

Q.

The disease 'rust of wheat' in plants is caused by___ .

Q.

What is the chemical name for vitamin ${\mathrm{B}}_3$?

Q.

Hairy leaves of many plants are associated with resistance to__________.

Q.

Biotechnology through genetic engineering has made it possible to modify organisms and produce new varieties by manipulating the genes. Which of the following is the scope of biotechnology with this approach?

1. Production of drought-resistant varieties.

2. Production of plants with higher disease resistance.

3. Production of effective vaccines

4. Production of alcohol using microbes

Q. Arrange the steps of somatic hybridisation in the correct order.

1. Select hybrids
2. Induce cell wall
3. Degrade cellwall
4. Fuse protoplast
5. Callus

Q.

Which of the following is a rich source of vitamin A?

1. Salt

2. Carrot

3. Sugar

4. Honey

Q. Green Revolution techniques increased soil and water pollution.

1. True
2. False

Q. A variety of crops of desired characteristics can be achieved by introducing a gene.

1. True
2. False

Q. Why do we select crops with different nutrient requirement for inter-cropping? Give two reasons.

Q. Define biofortified crops.

Q.

What does the variety improvement of crops aim at?

Q. An improved insect resistant variety "Pusa Gaurav" is variety of _________

1. Bhindi

2. Brassica

3. Cow pea
4. Flat bean

Q. Identify the incorrectly matched pair with respect to biofortified crops.

1. Atlas 66-protein rich wheat hybrid
2. Shakti-protein rich maize hybrid
3. Protina-lysine rich maize hybrid

Q. Regarding the assertion and reason, choose the right option.
Assertion [A]: Green Revolution caused certain toxic effects to the environment.
Reason [R]: High inputs of fertilisers and pesticides are very harmful to the environment.

1. Both A and R are true and R explains A
2. Both A and R are true R does not explain A
3. Both A and R are false
4. A is true and R is false

Q. Assertion [A]: Green Revolution increased the toxicity of components of the environment.
Reason [R]: High inputs of fertilisers and pesticides are very harmful to the environment.

1. Both A and R are true and R explains A
2. Both A and R are true R does not explain A
3. A is true and R is false
4. Both A and R are false

Q. List the factors for which variety improvement is done?

Q. The rusts are serious disease of our economic plants. The disease is caused by the fungus :

1. Rhizopus
2. Ustilago
3. Puccinia
4. Agaricus

Q. Somatic hybridization is achieved through

1. protoplast fusion
2. rDNA technology
3. grafting
4. conjugation

Q. Mark the incorrect statement among the following.

1. Biofertilizers increase the soil fertility.
2. Fertilizers cause pollution.
3. Chemical fertilizers are costly.
4. Chemical fertilizers do not cause land degradation.

Q. Golden rice is a transgenic crop of the future with the following trait:

1. Insect resistance
2. High protein content
3. High vitamin A content
4. High lysine content

Q. Wart disease caused by Synchytrium endobioticum occurs in :

1. Cabbage
2. Pea
3. Groundnut
4. Potato

Q. Pesticides and insecticides are the only ways to prevent damage from pests.

1. True
2. False

Q. Crop variety improvement is done to achieve which of the following objectives?

1. Higher yield
2. Lesser resistance to insects
3. Lesser resistance to pets
4. Degraded quality of the agricultural products

Q. Golden rice is enriched with.

1. vitamin B
2. vitamin E
3. vitamin C
4. vitamin A

Q.

Find out the correct sentence.
(i) Hybridization means crossing between genetically dissimilar plants.
(ii) Cross between two varieties is called inter-specific hybridization.
(iii) Introducing genes of the desired character into a plant gives genetically modified crops.
(iv) Cross between plants of two species is called inter varietal hybridization.

1. (i) and (iii)

2. (ii) and (iv)

3. (ii) and (iii)

4. (iii) and (iv)

Q. The aim of biofortification is to provide a sufficient and diverse diet to the world population.

1. False
2. True

Q. Potato famine of Ireland was caused by the attack of fungus

1. Plasmopara viticola
2. Puccinia graminis
3. Phytophthora infestans
4. Phytophthora palmivora

Q. Who was the pioneer of Green Revolution?

1. Dr. Norman Borlaug
2. Dr. M.S. Swaminathan
3. Dr. P. Maheshwari
4. C.Subramanian

Q. Hybridisation involves crossing between genetically similar plants to produce plants with useful characters.

1. True
2. False