In order to obtain virus-free plants through tissue culture the best method is:
1. protoplast culture
2. embryo rescue
3. anther culture
4. meristem culture
Microbes found to be very useful in genetic engineering are:
1. Escherichia coli and Agrobacterium tumefaciens
2. Vibrio cholerae and a tailed bacteriophage
3. Diplococcus sp. and Pseudomonas sp.
4. Crown gall bacterium and caenorhabditis elegans
Golden rice is a promising transgenic crop. When released for cultivation, it will help in:
1. alleviation of vitamin-A deficiency
2. pest resistance
3. herbicide tolerance
4. producing a petrol-like fuel from rice
A. | During open heart, surgery blood is circulated in the heart-lung machine. |
B. | Blockage in coronary arteries X-ray by angiography. |
C. | Computerized Axial Tomography (CAT) shows a detailed internal structure as seen in a section of the body. |
D | X-ray provides clear and detailed images of organs like prostate glands and lungs. |
1. B and D
2. C and D
3. A and C
4. A and B
1. | A cell displaying a foreign antigen used for the synthesis of antigens. |
2. | Production of somaclonal variants in tissue cultures. |
3. | When a piece of RNA that is complementary in sequence is used to stop the expression of a specific gene |
4. | RNpolymerase-producingng DNA |
1. | mosquitoes | 2. | flies |
3. | nematodes | 4. | bollworms |
1. Escherichia
2. Mycobacterium
3. Rhizobium
4. Saccharomyces
1. | eliminate weeds from the field without the use of manual layout |
2. | eliminate weeds from the field without the use of herbicides |
3. | encourage eco-friendly herbicides |
4. | reduce herbicide accumulation in food particles for health safety |
1. | Flavr savr tomatoes |
2. | Starlink maize |
3. | Bt soybean |
4. | Golden rice |
Transgenic plants are:
1. | produced by a somatic embryo in artificial medium |
2. | generated by introducing foreign DNA into a cell and regenerating a plant from that cell |
3. | Produced after protoplast fusion in artificial medium |
4. | grown in artificial medium after hybridization in the field |