Which one of the following statements isnotcorrect with regard to genetically modified organisms?
This technique has applications only in plants.
Understanding Genetically Modified Organisms (GMOs)
Genetically Modified Organisms (GMOs) are organisms whose genetic material (DNA) has been altered in a way that does not occur naturally by mating and/or natural recombination. This often involves introducing a gene from one organism into another to give it a new trait, such as resistance to pests or diseases, or tolerance to herbicides.
Analyzing Statements on Genetically Modified Organisms
Let's carefully look at each statement provided regarding genetically modified organisms to determine which one is not correct.
Statement 1: Gene Transfer in Genetically Modified Organisms
The statement says: "In this technique, a gene from one organism is isolated and transferred to the cell of another organism."
This statement accurately describes a core process in creating genetically modified organisms. Genes containing desired traits are indeed isolated from a donor organism and introduced into the recipient organism's cells. This is the fundamental principle of genetic engineering used to produce transgenic organisms.
Therefore, this statement is correct.
Statement 2: Applications of Genetic Modification
The statement says: "This technique has applications only in plants."
Genetic modification techniques are applied to a wide range of organisms, not just plants. While genetically modified crops are common, genetic engineering is also used to create:
- Genetically modified animals: For research, production of pharmaceuticals (like insulin in milk), improving livestock traits, or creating disease-resistant animals.
- Genetically modified microorganisms: Such as bacteria or yeast used in industrial processes, producing enzymes, medicines (like human insulin), or biofuels.
Since genetic modification is applied to plants, animals, and microorganisms, the statement that its applications are "only in plants" is factually inaccurate.
Therefore, this statement is not correct.
Statement 3: Gene Spread from Genetically Modified Crops
The statement says: "Genes for insect resistance may spread from crop plants to wild plants."
This statement refers to the potential for gene flow, where pollen from genetically modified crop plants can carry the introduced genes (like those providing insect resistance) to related wild plant species through cross-pollination. This is a well-recognized environmental concern associated with genetically modified crops and is studied extensively. While the likelihood and impact vary depending on the crop and environment, the possibility exists.
Therefore, this statement is correct as a potential consequence.
Statement 4: Producing Transgenic Animals
The statement says: "To produce a transgenic animal the novel genes are inserted at a very early stage of development."
This is a common and effective method for creating transgenic animals. By introducing the foreign gene (novel gene) into fertilized eggs or very early embryos, the gene can be incorporated into the developing organism's genome. This ensures that the gene is present in most, if not all, cells of the resulting animal, including its germline cells, allowing the trait to be passed on to future generations.
Therefore, this statement is correct.
Identifying the Incorrect Statement about GMOs
Based on the analysis of each statement, the statement that is not correct with regard to genetically modified organisms is: "This technique has applications only in plants."
Revision Table: Key Facts about GMOs
| Aspect of GMOs | Description |
|---|---|
| Definition | Organisms with altered genetic material, often by gene transfer. |
| Method | Isolation and transfer of genes between organisms. |
| Applications | Used in plants, animals, and microorganisms. |
| Transgenic Animals | Often created by gene insertion at early developmental stages. |
| Potential Issue | Gene flow (spread of modified genes to wild relatives) can occur. |
Additional Information on Genetic Engineering and GMOs
Genetic engineering is a powerful set of tools used in biotechnology. Besides creating GMOs with new traits, it's also used in gene therapy (introducing genes into humans to treat diseases) and producing biological products like vaccines and enzymes.
The development and use of genetically modified organisms involve ongoing discussions about their potential benefits (like increased yields, reduced pesticide use, improved nutrition) and potential risks (like environmental impact, gene flow, effects on biodiversity, and socio-economic implications). Regulatory bodies around the world assess GMOs before they are approved for commercial use.
Important Questions from Biotechnology
Given below are two statements :
Statement I:
Restriction endonucleases are enzymes naturally found in bacteria, where they protect the host cell by degrading foreign DNA.
Statement II:
All restriction endonucleases cut both strands of the DNA molecule at the exact same position, producing 'blunt ends'.
In the light of the above statements, choose the most appropriate answer from the options given below:
Complementary ds RNA which prevents translation is formed in ________.
Which of the following is NOT an application of PCR?
'Golden rice' variety of rice shows:
- Which of the following is a desirable characteristic of an ideal cloning vector?
