Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
Frequent irrigation of the crop
Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid
Application of iron magnesium to promote synthesis of chlorophyll
Cry-1 endotoxins obtained from Bacillus thuringiensis are effective against
mosquitoes
flies
nematodes
boll worms
Which one of the following proved effective for biological control of nematodal diseases in plants?
Pisolithus tinctorius
Pseudomonas cepacia
Gliocladium virens
Paecilomyces lilacinus
An important step in the manufacture of pulp for paper industry from the woody tissues of palnt is the
preparation of pure cellulose by removing lignin
removal of oils present in the wood by treatment with suitable chemicals
removal of water from the wood by prolonged heating at approximately 500C
treatment of wood with chemical that breakdown cellulose
A transgenic food crop which may help in solving the problem of night blindness in developing countries is
Flavr savr tomatoes
Starlink maize
Bt soybean
Golden rice
Main objective of production/ use of herbicide resistant GM crops is to
eliminate weeds from the field without the use of manual labour
eliminate weeds from the field without the use of herbicides
encourage eco-friendly herbicides
reduce herbicide accumulation in food particles for health safety
The Ti plasmid is often used for making transgenic plants. This plasmid is found in
Azotobacter
Rhizobium of the roots of leguminous plants
Agrobacterium
Yeast as a 2µm plasmid
Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
Jatropha
Azadirachta
Musa
Aegilops
Which one thing is not true about antibiotics?
The term “antibiotic” was coined by Selman Waksman in 1942
First antibiotic was discovered by Alexander Flemming
Each antibiotic is effective only against one particular kind of germ
Some persons can be allergic to a particular antibiotic
The technique of obtaining large number of plantlets by tissue culture method is called
plantlet culture
organ culture
micro-propagation
macro-propagation
