Strategies for Enhancement in Food Production

To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken ?

1. Epidermis only
2. Palisade parenchyma
3. Both apical and axillary meristems
4. Apical meristem only

In vitro clonal propagation in plants is characterized by :

1. Microscopy
2. Northern blotting
3. Electrophoresis and HPLC
4. PCR and RAPD

In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :

1. germplasm collection
2. evaluation and selection of parents
3. selection of superior recombinants
4. cross-hybridisation among the selected parents

Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising:

1. development of new species
2. genetically uniform population identical to the original parent
3. variants through picking up somaclonal variations
4. homozygous diploid plants

Which of the following statements is not true about somatic embryogenesis ?

1. Somatic embryos can develop from microspores
2. Somatic embryo is induced usually by an auxin such as 2,4-D
3. The pattern of development of a somatic embryo is comparable to that of a zygotic embryo
4. A somatic embryo develops from a somatic cell

Consider the following four statements (a-d) and select the option which includes all the correct ones only :

1. Statements B, C and D
2. Statements C, D
3. Statements A, C and D
4. Statements A, B

Green revolution in India occurred during -

1. 1980's
2. 1950's
3. 1960's
4. 1970's

Which one of the following is a case of wrong matching?

1. Somatic hybridization - Fusion of two diverse cells
2. Callus - Unorganised mass of cells produced in tissue culture
3. Vector DNA - Site for tRNA synthesis
4. Micropropagation - In vitro production of plants in large numbers

Which part would be most suitable for raising virus-free plants for micropropagation?

1. Vascular tissue
2. Node
3. Bark
4. Meristem

When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both parents. This phenomenon is called :

1. Splicing
2. Transformation
3. Heterosis
4. Metamorphosis