Tag: transgenic organisms

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Questions Related to transgenic organisms

Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

Which of the following is true about the advantages of genetically modified crops?
(i) It increases the quality and quantity of food.
(ii) It helps overcome the world shortage of food and prevent famines
(iii) It produces disease-resistant crops.

  1. Only (i) and (ii)

  2. Only (i) and (iii)

  3. Only (ii) and (iii)

  4. (i), (ii) and (iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetically modified crops are the crop which consists modified DNA sequences. The modifies sequence expresses itself and increases the quality and quantity of food and promotes the development of disease resistant varieties.

So, the correct answer is option D.

Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

A GM crop is

  1. Irradiated crop

  2. Transgenic crop

  3. Raised on green manure

  4. A green manure
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The correct option is B.
GM (Genetically modified crops) are plants which has been modified using genetic engineering methods. In most cases, the aim is to introduce a new trait to the plant. GM crop is a transgenic crop.
Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

Introduction of genetically modified food is not desirable because

  1. It will affect economy of developing countries.

  2. The products are less tasty.

  3. They are costly.

  4. There is danger of entry of toxins and virus in food.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A significant concern regarding the introduction of genetically modified food is the potential for horizontal gene transfer or the unintended presence of allergens or toxins that could pose health risks to consumers.

Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

GMO technology is useful for ______________.

  1. Making crops more tolerant to abiotic stresses

  2. Helping to reduce post-harvest losses

  3. Enhancing nutritional value of food

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

GMO technology is versatile and is used for improving crop resilience to abiotic stresses (like drought or salinity), reducing post-harvest losses (like delayed ripening), and enhancing nutritional content (like Golden Rice).

Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

Genetically engineered male sterile crop plants may be produced by inserting

  1. Bt toxin gene

  2. Barnase gene

  3. Lectin gene

  4. Chitinase gene
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Barnase gene, when expressed in the tapetum cells of plants, leads to the destruction of these cells, resulting in male sterility. This is a common technique used in hybrid seed production.

Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

Two microbes found to be very useful in genetic engineering are-

  1. Escherichia coli and Agrobacterium tumefaciens

  2. Vibrio cholerae and a tailed bacteriophage

  3. Diplococcus sp.and Pseudomonas sp.

  4. Crown gall bacterium and Caenorhabditis

    elegans
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • E. coli is a perfect model for several reasons: E. coli is a single-celled organism that can be manipulated and killed with no ethical concerns. It has a rapid growth rate and is very easy to culture and grow. Finally, and most importantly, E. coli genetics are well-studied and can be manipulated easily.
  • The basis of Agrobacterium-mediated genetic engineering is that the T-DNA of A. tumefaciens is excised and integrates into the plant genome as part of the natural infection process by this bacterium. An Agrobacterium cell to act as the vehicle for a transforming plasmid. a Ti plasmid with functional Vir genes.

So, the correct answer is 'Escherichia coli and Agrobacterium tumefaciens'.

Multiple choice zoology applications of biotechnology genetically modified organism transgenic organisms genetic modification and biotechnology

Which of the following bacteria is used as a vector for plant genetic engineering?

  1. Agrobacterium tumefaciens

  2. Bacteriophages

  3. Thermus aquaticus

  4. Pyrococcus furiosus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Since A. tumefaciens is a natural plant genetic engineer known to induce tumours in plants by transferring j and integrating its DNA into the host genome. Therefore, by slightly manipulating, i.e., removing the tumour causing genes and replacing them with desired genes, it can be easily used as a plant vector.

So, the correct answer is 'Agrobacterium tumefaciens'.