Advertisements
Advertisements
प्रश्न
Why are bio-fertilizers preferred over chemical fertilizers?
उत्तर
Biofertilizers are preferred for chemical fertilizers due to the following advantages :
(i) Decomposition products of biofertilizers help to bring mineral constituents of soil into solution.
(ii They improve physiochemical properties of soil such as cation exchange and buffering action.
(iii) They modify the physical properties like granulation of the soil and increases permeability and moisture-holding capacity of the soil.
(iv) They are economically cheaper than chemical fertilizers.
(v) Biofertilizers do not cause any harm to the environment while many chemical fertilizers are non-degradable and cause soil and water pollution.
(vi) They provide food for soil microbes and thus enhance microbial activities.
APPEARS IN
संबंधित प्रश्न
Define vector? write any two examples,
Identify the characters that a cloning vector should possess.
i. Origin of replication (Ori)
ii. Ability to destroy the alien DNA
ii. Cloning site to link the alien DNA
iv. The tumour inducing plasmid Ti
v. Selectable marker
vi. Low molecular weight
For which of the following purpose restriction endonuclease enzyme is used in genetic engineering?
Which of the following is the right combination of primers in a PCR to amplify the DNA product?
Following are the four statements regarding separation of DNA fragments using Gel electrophoresis. Identify the INCORRECT statements.
i. DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal.
ii. DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA.
iii. Smaller the size of DNA fragment, larger is the distance it travels through it.
iv. Pure DNA can be visualized directly by exposing to UV radiation.
A technique used to make numerous copies of a specific DNA segment quickly and accurately is called ______
Annealing step of PCR operates at ______ °C.
Write steps involved in gene amplification.
What is EcoRI?
Name the source of thermostable DNA polymerase.
