Q. No.Plants genetically engineered to make them resistant to glyphosate was an important achievement because:
1.
glyphosate promotes frost damage
2.
glyphosate encourages the production of fruit that is lower in protein
3.
glyphosate is the active ingredient in herbicides
4.
glyphosate prevents the transfer of genes into the plants
Production of transgenic plants is easier than the production of transgenic animals mainly because:
| 1. | Plant cells can grow in cell culture. |
| 2. | Plant cells have a lower number of potentially lethal genes. |
| 3. | Plant cells are totipotent. |
| 4. | Plants do have cancers. |
Protoplast fusion can be achieved with the use of:
| 1. | Colchicine | 2. | Polyethylene Glycol |
| 3. | Polyacryl amide | 4. | Ethidium bromide |
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Somatic embryo regeneration in micropropagation is induced by high concentrations of:
| 1. | Cytokinins | 2. | Gibberellins |
| 3. | Auxins | 4. | Zinc |
Plantlets regenerated during micropropagation are subjected to hardening where they are grown in the conditions of:
1. sufficient light and high humidity
2. sufficient light and low humidity
3. decreased light and high humidity
4. decreased light and low humidity
A fragment of nucleic acid (DNA or RNA) that can be used to identify, usually through autoradiography, specific DNA or RNA molecules bearing the complementary sequence is called:
| 1. | Vector | 2. | Probe |
| 3. | Selectable marker | 4. | Reporter gene |
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“Flavr Savr” is the name of the first genetically modified:
1. food approved for human use
2. salmon fish
3. herbicide-resistant plant
4. bacterium capable of remediation in oil spills
A biological process in which RNA molecules inhibit gene expression or translation, by neutralizing targeted mRNA molecules is known as:
| 1. | Bioprospecting | 2. | Molecular pharming |
| 3. | RNA interference | 4. | Insertional mutagenesis |
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Consider the two statements:
| I: | Retroviruses are useful as vectors in gene therapy. |
| II: | They can produce useful gene products in significantly greater quantities than a single human cell can. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. Only I is correct.
4. Both I and II are incorrect.
At present, genetic modification has been able to bring about all the following in crops except:
1. Tolerance to abiotic stresses
2. Enhanced nutritional value
3. Capability to fix atmospheric nitrogen
4. Reduced reliance on chemical pesticides
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