Biotechnology and its Applications
CBSE Class 12 Biology · every board question from this chapter, 2022–2026 · 35 of them repeated across years
- Golden rice is a promising transgenic crop. When released for cultivation, it will help in:2026asked 3×
- Pomato was produced by fusing protoplasts of2026asked 3×
- The recombinant protein obtained from transgenic animals that could be used to treat emphysema is:2026
- Transgenic animals have their genetic material manipulated. Select the correct option in reference to transgenic animals.2026
- Genetically modified tobacco plants were produced using Agrobacterium vectors. Which property of Agrobacterium helps in carrying…2026asked 3×
- Bt-toxin genes have been expressed in plants in order to provide resistance against: (i) lepidopterans and fungi (ii) animals and…2026
- Protein encoded by gene Cry-I Ab controls the infestation of which of the following?2026
- Assertion: The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow…2026asked 3×
- A patent with Type I diabetes is unable to produce sufficient insulin. How has recombinant DNA technology helped in addressing…2026
- Write any two advantages of producing plants by micro-propagation.2026
- A foreign company patented the medicinal use of turmeric already known to Indian households. Name and define this unethical…2026
- GEAC is a regulatory body under the Ministry of Environment, Forest and Climate Change in India. Write the full form of GEAC.…2026
- Transgenic animals are produced by man. Explain any three ways in which such animals can be beneficial to humans.2026asked 2×
- Write the scientific name of the nematode that infects tobacco plants. Also name the part of the plant that it infects. How is…2026
- How is insulin different from proinsulin? Explain all the stages of how human insulin is produced through rDNA technology.2026asked 2×
- Suggest and describe a technique through which a healthy sugarcane plant can be obtained from virus infected sugarcane plant.2026
- A farmer grew two varieties of corn crop in field A and B. He grew normal corn crops in field A and GM corn crops in field B. He…2026
- GEAC stands for2025
- RNA interference (RNAi) helps in making tobacco-plant resistant to a nematode (Meloidegyne incognita) Choose the correct option…2025
- GEAC stands for2025
- The most widely used transgenic animal for testing the safety of vaccine before they are used in humans is:2025
- GEAC stands for2025
- Which one of the following is not the product of transgenic experiments?2025asked 2×
- RNA interference (RNAi) helps in making tobacco-plant resistant to a nematode (Meloidegyne incognitia) Choose the correct option…2025
- Assertion: The meristems are grown 'in vitro' to obtain virus-free plants from an infected plant. Reason (R): If the plant is…2025asked 3×
- Assertion: Biotechnology produces transgenic microorganisms that function as microfactories for proteins. Reason (R): Transgenic…2025
- Assertion: Isolated single cells can be fused to produce somatic hybrids. Reason (R): Cells selected for somatic hybridisation…2025asked 3×
- Assertion: A patient of ADA-deficiency requires periodic or repeated infusion of genetically-engineered lymphocytes. Reason (R):…2025
- Name the Indian crop variety for which, in 1997, an American company got patent rights through the US Patent and Trademark…2025
- Biotechnology has helped farmers to get pest-resistant cotton plants. Explain the technique adopted along with its mode of…2025
- Student to attempt either option- or: A patient with ADA deficiency requires periodic infusion of genetically engineered…2025asked 3×
- Gene therapy can be used to treat an ADA deficient patient. Explain. Is it a permanent cure? How can ADA be cured permanently?2025
- Name the process involved in the production of nematode-resistant tobacco plants, using genetic engineering. Explain the strategy…2025
- Enlist three advantages of genetically modified plants.2025asked 3×
- Why are transgenic animals so called? With the help of an example each, explain the role of transgenic animals in the following:…2025asked 2×
- An application of biotechnology in agriculture involves the production of pest resistant plants, using "cry" gene from a…2025
- The insulin synthesised in our body is different from that synthesised by Eli Lilly company using recombinant DNA technology.…2025asked 2×
- Explain the beneficial role of the following, produced as a result of the processes of biotechnology, to mankind: Cow named Rosie…2025asked 3×
- (i) Explain how some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans but do…2025
- (i) Explain how human pro-insulin is processed in the cell to become a fully mature functional insulin. (ii) Describe how human…2025
- Define transgenic animals. Explain in detail any four areas where they can be used for human benefit. OR Describe the structure…2025
- (i) Describe the approach of gene therapy used for the treatment of a 4-year-old girl suffering from Adenosine Deaminase…2025
- (i) Explain why the insecticidal protein producing by Bacillus thuringiensis does not kill the bacteria itself. (ii) How has man…2025
- Name and explain the biotechnological strategy wherein the infection by the nematode Meloidegyne incognitia can be prevented…2025
- The specific Bt toxin genes which protect the cotton plants against the cotton bollworms are:2024
- Which one of the following transgenic animals is being used to test the safety of the polio vaccine?2024asked 3×
- Study the following list of bioactive substances and their action: 1 Select the option in which the bioactive substances are…2024
- The improved trait that is found in the genetically modified transgenic crop - Golden rice is:2024
- ELISA technique is based on the principle of2024asked 3×
- Assertion: Agrobacterium tumefaciens is a pathogen of several monocot plants. Reason (R): It is able to deliver a piece of DNA…2024asked 3×
- Assertion: Patents are granted by government to an inventor. Reason (R): Patents prevents others from commercial use of an…2024asked 3×
- Assertion: Functional ADA cDNA genes must be inserted in the lymphocytes at the early embryonic stage in gene therapy for ADA…2024
- Assertion: Indian Government has set up an organisation known as GEAC to decide the validity of GM research. Reason (R): Genetic…2024asked 2×
- Name the first developed transgenic cow. Explain the improvement in the quality of the milk produced by it.2024
- Why does a patient of ADA - deficiency require repeated infusions of genetically engineered lymphocytes? Suggest a possible…2024
- Name the source from which insulin was extracted in earlier times. Why is this insulin no more in use by the diabetic patients?…2024
- How has the use of Agrobacterium as vector helped in controlling Meloidogyne incognita infestation in tobacco plants? Explain in…2024
- What are transgenic animals? Name the transgenic animal having the largest number amongst all the existing transgenic animals.…2024asked 2×
- The first clinical gene therapy was given in 1990 to a 4-year-old girl with ADA deficiency. Mention the cause of this disorder.…2024
- State why plant breeders are interested in artificial hybridisation programme. How do they carry out this process?2024
- The picture given below shows: Roots of a typical control tobacco crop plant (infected). Transgenic tobacco plant showing healthy…2024
- (i) What are transgenic animals? (ii) Name the first transgenic cow and state its importance. OR (i) Explain the convention for…2024asked 3×
- Give the scientific name of the bacteria widely used in biotechnology to create a GM cotton crop resistant to bollworm attacks.…2024asked 3×
- Explain the role of transgenic animals in: Production of Biological products Studying diseases Chemical safety testing2024asked 2×
- (i) Why should a cell be made competent to take up an alien DNA? How can a bacterial cell be made competent using calcium ions?…2024asked 3×
- The first gene-sequenced crop is:2023
- Which one of the following products was produced as a result of DNA manipulation in the first transgenic cow 'Rosie'?2023
- Which one of the following is used during 'RNA i' process, to silence the desired gene?2023
- After the completion of biosynthetic stage in a bioreactor, the product undergoes a series of processes before it is ready for…2023
- Who among the following challenged the patent right granted to the University of Mississippi Medical Centre for 'use of turmeric…2023
- Assertion: A patient of ADA deficiency undergoing treatment for gene therapy requires periodic infusion of genetically engineered…2023
- Assertion: Crystal protein Bt toxin does not kill the Bacillus but kills the insects. Reason (R): Bt toxin exists in inactive…2023
- Name (i) a GM cereal crop having enhanced nutritional value, (ii) the nutrient it is rich in. State any two benefits of…2023
- Write the characteristics of 'stem cells'. From where can one obtain 'stem cells' in humans? State any two applications of 'stem…2023asked 3×
- One of the major approaches of crop improvement programme is Artificial Hybridisation. Explain the steps involved in making sure…2023asked 3×
- On spraying Bacillus thuringiensis on an infected cotton crop field the pests are killed by the toxin, however the toxin although…2023
- Write the scientific name of the nematode that infests the tobacco plants and the part that it infests. How is Agrobacterium used…2023asked 3×
- Eli Lilly's contribution for diabetic patients through r-DNA technology has been overwhelmingly accepted. Explain how?2023
- "RNA interference has been used to produce transgenic tobacco plants to protect them from the infestation by specific nematodes."…2023
- Name the source organism (scientific name) that produces statins. Mention its use in medical field and how does it act.2022
- "Genetically modified plants are considered to be superior to non-genetically modified plants." Explain, giving three reasons why.2022
- Development of recombinant DNA technology has made the expression of protective protein antigens (to be used as 'vaccines') in…2022
- Given below is the stepwise schematic representation of the process of electrophoresis. Identify the 'alphabets' representing (i)…2022asked 3×
- Name two naturally occurring sources, one that transfers pathogenic genes into a plant cells and the other into an animal cell…2022
- What are cry-proteins? With the help of a suitable example, explain how it acts as a biological pesticide.2022asked 3×
- With the help of a storyboard or a flowchart only, explain all the stages of how human insulin is produced through r-DNA…2022asked 2×
- (i) Name three molecular diagnostic techniques for diagnosis of a disease. (ii) List three advantages of molecular diagnostic…2022
- How does a gene therapy involving direct modification of the cells, in order to achieve a therapeutic goal is used in the…2022asked 2×
- An application of biotechnology in agriculture involves production of pest resistant plants using 'cry' genes from a bacterium,…2022
- An application of biotechnology in agriculture involves production of pest resistant plants using 'cry' genes from a bacterium.…2022
- There are two different farm lands, one where Bt-cotton crop was cultivated and the other where non Bt-cotton crop (indigenous)…2022asked 3×
- Cloning of genes, play a very significant role in genetic engineering, helping the transfer of desirable foreign genes into…2022asked 3×
- Development of recombinant DNA technology has opened gates to many breakthroughs in the fields of medicine and agriculture. This…2022asked 3×
- To save the crop plant from the attack of various insect pests the biotechnologists have developed many pest resistant plants.…2022asked 3×
Answers come from CBSE’s own marking schemes. How we source them.