Strategies for Enhancement in Food Production · Question 15

Outbreeding is an important strategy of animal husbandry because it :

1. helps in accumulation of superior genes.
2. is useful in overcoming inbreeding depression.
3. is useful in producing purelines of animals.
4. exposes harmful recessive genes that are eliminated by selection.

A protoplast is a cell -

1. undergoing division
2. without plasma membrane
3. without nucleus
4. without cell wall

A technique of micropropagation is

1. somatic embryogenesis
2. embryo rescue
3. protoplast fusion
4. somatic hybridisation

Which of the following enhances or induces fusion of protoplasts ?

1. Sodium chloride and potassium chloride
2. IAA and kinetin
3. Polyethylene glycol and sodium nitrate
4. IAA and gibberellins

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