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
The technique of obtaining large number of plantlets by tissue culture method is called
plantlet culture
organ culture
micro-propagation
macro-propagation
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
Consider the following statements about biomedical technologiesa. During open heart surgery blood is circulated in the heart-lung machineb. Blockage in coronary arteries is removed by angiographyc. Computerized Axial Tomography (CAT) shows detailed internal structure as seen in a section of body.d. X-ray provides clear and detailed images of organs like prostate glands and lungsWhich two of the above statements are correct?
B and D
C and D
A and C
A and B
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
Two bacteria found to be very useful in genetic engineering experiments are
Nitrosomonas and Klebsiella
Escherichia and Agrobacterium
Nitrobacter and Azotobacter
Rhizobium and Diplococcus
What is antisense technology?
A cell displaying a foreign antigen used for synthesis of antigens
Production of somaclonal variants in tissue cultures
When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
RNA polymerase producing DNA
Which one of the following proved effective for biological control of nematodal diseases in plants?
Pisolithus tinctorius
Pseudomonas cepacia
Gliocladium virens
Paecilomyces lilacinus
Which one of the micro organism is used for production of citric acid in industries?
Lactobacillus bulgaris
Penicillium citrinum
Aspergillus niger
Rhizopus nigricans