Tag: transgenic organisms

Questions Related to transgenic organisms

How many statements given are correct with respect to genetically modified plants.

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

  1. Golden rice is an example of genetically modified crop

  2. GM crops has been used to create tailor made plants

  3. GM crops made crops more tolerant to abiotic stresses

  4. Jatropha is also an example of GM-crop

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Correct Option: A

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.

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

  1. Only (i) and (ii)

  2. Only (i) and (iii)

  3. Only (ii) and (iii)

  4. (i), (ii) and (iii)

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Correct Option: D
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.

A GM crop is

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

  1. Irradiated crop

  2. Transgenic crop

  3. Raised on green manure

  4. A green manure

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Correct Option: B
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.

Introduction of genetically modified food is not desirable because

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

  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.

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Correct Option: D

GMO technology is useful for ______________.

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

  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

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Correct Option: D

Genetically engineered male sterile crop plants may be produced by inserting

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

  1. Bt toxin gene

  2. Barnase gene

  3. Lectin gene

  4. Chitinase gene

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Correct Option: B

Which one of the following pairs is not correctly matched?

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

  1. Bioremediation - Microbe mediated cleaning of pollution

  2. Southern blot - DNA hybridization

  3. Western blot - Dideozy method of DNA sequencing

  4. Northern blot - Sequencing of RNA

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Correct Option: A

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

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

  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

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Correct Option: A
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'.

Which of the following is not a genetically modified organism (GOM)?

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

  1. Golden rice

  2. Rosie

  3. Dogie

  4. Dolly

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Correct Option: D
Explanation:

Golden rice, Rosie and Dogie all are genetically modified organisms. Dolly, the sheep is a coloured animal, as she was created using an unmodified cell. 

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

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

  1. Agrobacterium tumefaciens

  2. Bacteriophages

  3. Thermus aquaticus

  4. Pyrococcus furiosus

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Correct Option: A
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'.