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. |
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 |
Protoplast fusion can be achieved with the use of:
1. | Colchicine | 2. | Polyethylene Glycol |
3. | Polyacryl amide | 4. | Ethidium bromide |
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 |
“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 |
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