Short Answer TypeExplain enzyme-replacement therapy to treat adenosine deaminase deficiency. Mention two disadvantages of this procedure.
(a) Why must a cell be made 'competent' in biotechnology experiments ? How does
calcium ion help in doing so ?
(b) State the role of 'biolistic gun' in biotechnology experiments.
How has RNAi technique helped to prevent the infestation of roots in tobacco plants by a nematode Meloidegyne incognita?
Biotechnologists refer to Agrobacterium tumifaciens as a natural genetic engineer of plants. Give reasons to support the statement.
Scientists have succeeded in recovering healthy sugarcane plants from a diseased one.
1. Name the part of the plant used as explant by the scientists.
2. Describe the procedure the scientists followed to recover the healthy plants.
3. Name this technology used for crop improvement.
How does the application of the fungal genus, Glomus, to the agricultural farm increase the farm output?
The application of Glomus to agricultural field increases the farm output by increasing the nutrient availability to the crops. Glomus develops symbiotic association with the roots of plants, called mycorrhiza. It absorbs phosphorus from the soil and passes it to the plants it associates with. In return, it derives sugars from the host plant cells for its survival.
Thus, it acts as a biofertiliser. This association has other advantages also, like
(i) Resistance to root borne pathogens
(ii) Tolerance to salinity and drought
(iii) Increase in plant growth and development
Switch
