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 |
A protoxin is:
1. | A primitive toxin | 2. | A denatured toxin |
3. | Toxin produced by protozoa | 4. | Inactive toxin |
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 |
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 |
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 |
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 |
Over 95 % of all transgenic animals are:
1. | Mice | 2. | Pigs |
3. | Sheep | 4. | Rabbits |
The transgenic cow, Rosie, produced milk that:
1. | Contained human beta lactalbumin |
2. | contained interferons to treat viral infections |
3. | contained Alpha – 1 antitrypsin |
4. | Is protein enriched |
Match each item in Column I with one in Column II and select the answer from the codes given below:
Column I |
Column II |
||
A. |
Bioprospecting |
a. |
the process of discovery and commercialization of new products based on biological resources |
B. |
Biopiracy |
b. |
the exploitative patenting of already widely used natural resources, such as plant varieties, by commercial entities |
C. |
Bioremediation |
c. |
a process that uses microorganisms or their enzymes to treat polluted sites for regaining their original condition |
D. |
Biofortification |
d. |
the process by which the nutritional quality of food crops is improved through agronomic practices, conventional plant breeding, or modern biotechnology |
Codes
Options: | A | B | C | D |
1. | a | b | c | d |
2. | a | b | d | c |
3. | b | a | c | d |
4. | b | a | d | c |
Antisense technology:
1. | selectively blocks the expression of a gene. |
2. | combines genetic material from different species. |
3. | combines organelles and cells. |
4. | alters or transfers cells. |