A probe which is a molecule used to locate homologous sequences in a mixture of DNA or RNA molecules could be:
1. | A ssRNA | 2. | A ssDNA |
3. | Either RNA or DNA | 4. | Can be ssDNA but not ssRNA |
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A protoxin is:
1. | A primitive toxin | 2. | A denatured toxin |
3. | Toxin produced by protozoa | 4. | Inactive toxin |
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The trigger for activation of toxin of Bacillus thuringiensis is:
1. | Acidic pH of stomach |
2. | High temperature |
3. | Alkaline pH of gut |
4. | Mechanical action in the insect gut |
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ADA is an enzyme which is deficient in a genetic disorder SCID. What is the full form of ADA?
1. | Adenosine deoxyaminase | 2. | Adenosine deaminase |
3. | Aspartate deaminase | 4. | Arginine deaminase |
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Silencing of a gene could be achieved through the use of:
1. | RNAi only | 2. | antisense RNA only |
3. | both RNAi and antisense RNA | 4. | none of the above |
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The term ‘totipotency’ refers to the capacity of a:
1. cell to generate the whole plant
2. bud to generate the whole plant
3. seed to germinate
4. cell to enlarge in size
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The plantlets produced during plant tissue culture are called somaclones because:
1. | They can be produced in a very short span of time |
2. | They are the result of the somatic hybridization of two cells |
3. | The gametes develop parthenogenetically to produce genetically identical plantlets |
4. | They are genetically identical to the original plant from which they were grown |
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RNAi, as a mechanism of cellular defense, takes place in:
1. | All bacteria | 2. | All unicellular organisms |
3. | All plants only | 4. | All eukaryotic organisms |
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The first clinical gene therapy trial was given in 1990 to a 4 year girl with:
1. | Alpha – 1 antitrypsin deficiency |
2. | Cystic fibrosis |
3. | Adenosine deaminase deficiency |
4. | Chronic myeloid leukemia |
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Over 95 % of all transgenic animals are:
1. | Mice | 2. | Pigs |
3. | Sheep | 4. | Rabbits |
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