Q. No.Restriction endonucleases present in bacterial cells provide an advantage to the cell because these enzymes:
1.
can identify the mutated sequences on the chromosomal DNA and help in their repair
2.
selectively bind to particular nucleotide sequences that may appear in viral DNA preventing its replication in the cell
3.
can cut the plasmid DNA of the bacterial cell that allows them to recombine foreign DNA into their plasmid DNA
4.
help the bacterium take up foreign DNA from their environment and combine it into their genome
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 |
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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. |
A direct target for gene therapy would include all the following cells except:
| 1. | erythrocytes | 2. | muscle fibers |
| 3. | hepatocytes | 4. | vascular endothelium |
Which of the following is a recombinant protein?
| 1. | Beta Galactosidase in E.coli | 2. | Insulin in humans |
| 3. | Somatotropin in humans | 4. | Interferon in E. coli |
The study of all the proteins encoded by the genome of an organism is called :
| 1. | Proteome | 2. | Proteomics |
| 3. | Translation studies | 4. | Genomics |
You want to transform the cells of sugarcane plants with the objective of introducing a disease-resistant gene in sugarcane plants. The best method to achieve this goal would be:
| 1. | The use of a gene gun |
| 2. | Microinjection |
| 3. | Agrobacterium tumefaciens mediation |
| 4. | Delivery of DNA by liposomes |
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 |
First genetically modified crop |
a |
Antibiotic-resistant tobacco plant |
|
B |
First genetically modified food |
b |
Flavr Savr |
|
C |
First genetically modified animal approved for food use |
c |
AquAdvantage Salmon |
|
D |
First genetically modified animal to be commercialized |
d |
GloFish |
Codes :
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | a | b | d | c |
| 3. | b | a | c | d |
| 4. | b | a | d | c |
What is antisense technology?
1. RNA polymerase producing DNA.
2. A cell displaying a foreign antigen used for synthesis of antigens.
3. Production of somaclonal variants in tissue cultures.
4. When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene.
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The bacterium Bacillus thuringiensis is widely used in contemporary biology as
1. Source of industrial enzyme
2. Indicator of water pollution.
3. Insecticide.
4. Agent for production of dairy products.
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