Biotechnology and its Applications – NEET-Style MCQs (Fresh Set)
A. Standard / Conceptual MCQs (Q1–30)
1. Medical Applications
Q1. Recombinant human insulin is produced in:
A. E. coli
B. Bacillus thuringiensis
C. Saccharomyces cerevisiae
D. Aspergillus niger
Q2. Gene therapy aims to:
A. Treat genetic disorders
B. Produce antibiotics
C. Make Bt crops
D. Ferment alcohol
Q3. Which of the following vaccines is produced using recombinant DNA technology?
A. Hepatitis B vaccine
B. Polio vaccine
C. BCG vaccine
D. Smallpox vaccine
Q4. Monoclonal antibodies are primarily used for:
A. Cancer diagnosis and treatment
B. Biofertilizer production
C. Ethanol fermentation
D. Bt cotton development
Q5. Tissue culture in medicine helps in:
A. Producing organs and cells for transplantation
B. Ethanol production
C. Antibiotic production
D. Bt cotton development
2. Agricultural Applications
Q6. Bt cotton is genetically modified to produce:
A. Cry protein for pest resistance
B. Insulin
C. Beta-carotene
D. Antibiotics
Q7. Golden rice is enriched with:
A. Beta-carotene (Vitamin A precursor)
B. Insulin
C. Cry protein
D. Antibiotics
Q8. Herbicide-resistant crops are made using:
A. Recombinant DNA technology
B. Conventional breeding only
C. Tissue culture
D. Fermentation
Q9. Biopesticides are preferred because:
A. They are eco-friendly and target-specific
B. They increase plant height
C. They produce ethanol
D. They are synthetic chemicals
Q10. Transgenic plants are developed to:
A. Improve yield, quality, and stress tolerance
B. Reduce growth
C. Produce insulin
D. Generate antibiotics
3. Industrial Applications
Q11. Microbes are widely used in industry to produce:
A. Enzymes, antibiotics, vitamins
B. Only proteins
C. Only RNA
D. Only ethanol
Q12. Citric acid industrially is produced using:
A. Aspergillus niger
B. E. coli
C. Bacillus subtilis
D. Saccharomyces cerevisiae
Q13. Ethanol (biofuel) production is mainly via:
A. Yeast fermentation of sugars
B. Bt bacteria
C. Aspergillus fermentation
D. Chemical synthesis
Q14. Recombinant vaccines are produced by:
A. Genetically engineered microbes
B. Plant tissue culture
C. Classical breeding
D. Chemical synthesis
Q15. Microbial enzymes are preferred because:
A. Cost-effective and work under controlled conditions
B. Require human cells
C. Degrade crops
D. Are toxic
4. Environmental Applications
Q16. Bioremediation uses microbes to:
A. Clean oil spills, degrade pesticides, and pollutants
B. Produce recombinant insulin
C. Generate Bt crops
D. Increase soil salinity
Q17. GM microbes are applied in:
A. Wastewater treatment
B. Vaccine production only
C. Antibiotic production only
D. Gene therapy only
Q18. Phytoremediation refers to:
A. Plants removing heavy metals from soil
B. Microbes producing ethanol
C. Microbes producing insulin
D. Tissue culture of crops
Q19. Biofertilizers improve soil fertility using:
A. Nitrogen-fixing bacteria
B. Bt proteins
C. Insulin
D. Citric acid
Q20. Biopesticides and biofertilizers are:
A. Eco-friendly alternatives to chemical inputs
B. Harmful chemicals
C. Synthetic hormones
D. Enzymes only
5. Ethical, Safety, and Regulatory Applications
Q21. GM crops are regulated to:
A. Ensure environmental and health safety
B. Prevent growth of plants
C. Produce insulin
D. Increase ethanol production
Q22. Biosafety guidelines in biotechnology aim to:
A. Prevent accidental release of GMOs
B. Reduce crop yield
C. Increase enzyme production
D. Promote antibiotic resistance
Q23. Ethical concerns in gene therapy arise due to:
A. Modification of the human genome
B. Microbial fermentation
C. Bt crops
D. Tissue culture
Q24. Public awareness in biotechnology is necessary because:
A. Helps understand benefits and risks
B. Reduces crop growth
C. Produces antibiotics
D. Produces biofertilizers
Q25. Horizontal gene transfer is a concern in GMOs because:
A. Transgenes can spread to wild relatives
B. It produces insulin
C. It increases fermentation
D. It creates biofertilizers
Q26. Recombinant vaccines are safer because:
A. They do not use whole pathogens
B. They always cure genetic disorders
C. They produce Bt proteins
D. They enhance soil fertility
Q27. Microbial biofactories are used for:
A. Large-scale production of drugs, enzymes, and vaccines
B. Only ethanol production
C. Only biopesticides
D. Only tissue culture
Q28. Regulatory agencies monitor biotech applications for:
A. Safety and environmental impact
B. Farmers only
C. Microbes only
D. Enzyme manufacturers only
Q29. GM crops can improve nutrition by:
A. Producing vitamins like beta-carotene
B. Producing antibiotics
C. Producing Cry protein only
D. Producing ethanol
Q30. Tissue culture and micropropagation help in:
A. Rapid multiplication of disease-free plants
B. Producing ethanol
C. Producing Bt crops only
D. Producing insulin only
A. Assertion–Reason MCQs (Q31–Q45)
| Q.No | Assertion (A) | Reason (R) |
|---|---|---|
| 31 | Recombinant insulin is produced in E. coli. | E. coli expresses the human insulin gene and secretes insulin. |
| 32 | Gene therapy can correct genetic disorders. | Functional genes are inserted into a patient’s genome. |
| 33 | Bt cotton produces Cry protein to kill pests. | Cry protein acts as a natural insecticide. |
| 34 | Golden rice is genetically engineered to produce beta-carotene. | Beta-carotene is a precursor of Vitamin A. |
| 35 | Microbes are used in industrial production of enzymes. | Microbes allow large-scale and cost-effective enzyme production. |
| 36 | Bioremediation uses microbes to degrade pollutants. | Microbes metabolize toxic substances into harmless compounds. |
| 37 | Tissue culture can produce disease-free plants. | Micropropagation ensures rapid multiplication of clones. |
| 38 | Recombinant vaccines do not use whole pathogens. | They use only antigenic proteins, making them safer. |
| 39 | GM crops may transfer genes to wild relatives. | Horizontal gene transfer could spread transgenes. |
| 40 | Ethical concerns exist in biotechnology. | Human genome modifications require careful oversight. |
| 41 | Biosafety guidelines are important in biotech labs. | They prevent accidental release of GMOs and pathogens. |
| 42 | Biofertilizers enhance soil fertility. | Nitrogen-fixing bacteria provide essential nutrients to plants. |
| 43 | Biopesticides reduce chemical pesticide use. | They are eco-friendly and target specific pests. |
| 44 | Microbial biofactories produce vaccines and enzymes. | Controlled growth conditions optimize yield. |
| 45 | Public awareness is important for GM crops. | Understanding benefits and risks helps safe adoption. |
B. Difficult / Case-Based MCQs (Q46–Q60)
| Q.No | Question |
|---|---|
| 46 | A diabetic patient requires insulin. Which biotech approach is used? |
| 47 | A farmer wants to grow pest-resistant cotton. Which gene should be inserted? |
| 48 | A child suffers from a defective gene causing a genetic disorder. What treatment can be used? |
| 49 | A laboratory needs to amplify a small DNA fragment for diagnostic purposes. Which technique is suitable? |
| 50 | Which plant-based method can remove heavy metals from contaminated soil? |
| 51 | Microbes are used to clean an oil spill in a coastal area. Which biotech method is applied? |
| 52 | To study gene expression at the mRNA level, which method is used? |
| 53 | Ethanol production from sugar in a biofuel industry is mainly performed by which organism? |
| 54 | A bioreactor is used for large-scale microbial production. What is its primary function? |
| 55 | Why are biopesticides preferred over chemical pesticides? |
| 56 | Recombinant vaccines are considered safer than conventional vaccines. Why? |
| 57 | Tissue culture and micropropagation are applied in agriculture. For what purpose? |
| 58 | Which microorganism is commonly used as a biofertilizer to fix atmospheric nitrogen? |
| 59 | Why is horizontal gene transfer considered a concern in GMOs? |
| 60 | Regulatory agencies monitor GM crops. What is the primary reason for such monitoring? |
Biotechnology and its Applications – Answer Key (Q1–Q60)
A. Standard / Conceptual MCQs (Q1–Q30)
| Q.No | Answer | Brief Explanation |
|---|---|---|
| 1 | A | E. coli is the most commonly used host for recombinant human insulin production. |
| 2 | A | Gene therapy introduces functional genes to correct genetic disorders. |
| 3 | A | Hepatitis B vaccine is produced via recombinant DNA technology. |
| 4 | A | Monoclonal antibodies are used in diagnosis and treatment of cancers. |
| 5 | A | Tissue culture helps produce organs or cells for transplantation. |
| 6 | A | Bt cotton produces Cry protein which is toxic to specific insect pests. |
| 7 | A | Golden rice is engineered to produce beta-carotene, a Vitamin A precursor. |
| 8 | A | Herbicide-resistant crops are made using recombinant DNA technology. |
| 9 | A | Biopesticides are eco-friendly and target specific pests without harming the environment. |
| 10 | A | Transgenic plants improve yield, quality, and stress tolerance. |
| 11 | A | Microbes are used industrially to produce enzymes, antibiotics, and vitamins. |
| 12 | A | Citric acid is industrially produced using Aspergillus niger. |
| 13 | A | Yeast ferments sugars anaerobically to produce ethanol. |
| 14 | A | Recombinant vaccines are produced by genetically engineered microbes. |
| 15 | A | Microbial enzymes are preferred due to cost-effectiveness and stability. |
| 16 | A | Bioremediation uses microbes to degrade environmental pollutants. |
| 17 | A | GM microbes can treat wastewater by degrading toxic substances. |
| 18 | A | Phytoremediation uses plants to remove heavy metals from soil. |
| 19 | A | Nitrogen-fixing bacteria in biofertilizers enhance soil fertility. |
| 20 | A | Biopesticides and biofertilizers are eco-friendly alternatives to chemicals. |
| 21 | A | GM crops are regulated to ensure environmental and human health safety. |
| 22 | A | Biosafety guidelines prevent accidental release of GMOs in labs. |
| 23 | A | Ethical concerns arise when modifying the human genome via gene therapy. |
| 24 | A | Public awareness helps people understand benefits and risks of biotechnology. |
| 25 | A | Horizontal gene transfer from GMOs may spread transgenes to wild species. |
| 26 | A | Recombinant vaccines use only antigenic proteins, making them safer. |
| 27 | A | Microbial biofactories allow large-scale production of enzymes, drugs, and vaccines. |
| 28 | A | Regulatory agencies ensure safe application and environmental compliance of GM crops. |
| 29 | A | GM crops like golden rice can improve nutrition by producing essential vitamins. |
| 30 | A | Tissue culture and micropropagation rapidly produce disease-free plants. |
B. Assertion–Reason MCQs (Q31–Q45)
| Q.No | Answer | Brief Explanation |
|---|---|---|
| 31 | A | E. coli produces recombinant insulin by expressing the human insulin gene. |
| 32 | A | Gene therapy corrects genetic disorders by inserting functional genes. |
| 33 | A | Bt cotton expresses Cry protein, which is toxic to insect pests. |
| 34 | A | Golden rice produces beta-carotene, a Vitamin A precursor, through inserted genes. |
| 35 | A | Microbes allow scalable and cost-effective industrial enzyme production. |
| 36 | A | Bioremediation uses microbial metabolism to detoxify pollutants. |
| 37 | A | Tissue culture allows rapid propagation of disease-free plant clones. |
| 38 | A | Recombinant vaccines use only antigenic proteins, not whole pathogens, for safety. |
| 39 | A | GM crops may transfer genes to wild relatives, a potential ecological risk. |
| 40 | A | Ethical concerns arise due to human genome modifications in biotech. |
| 41 | A | Biosafety guidelines prevent accidental GMO or pathogen release. |
| 42 | A | Biofertilizers contain nitrogen-fixing bacteria that enrich soil. |
| 43 | A | Biopesticides reduce chemical use and target specific pests safely. |
| 44 | A | Controlled bioreactor conditions optimize microbial production of enzymes and vaccines. |
| 45 | A | Public awareness ensures informed adoption and safe use of GM crops. |
C. Difficult / Case-Based MCQs (Q46–Q60)
| Q.No | Answer | Brief Explanation |
|---|---|---|
| 46 | A | Recombinant insulin in E. coli treats diabetic patients effectively. |
| 47 | A | Cry (Bt) gene inserted into cotton confers insect resistance. |
| 48 | A | Gene therapy corrects defective genes in patients with genetic disorders. |
| 49 | A | PCR amplifies small DNA fragments for diagnostics. |
| 50 | A | Phytoremediation plants accumulate heavy metals from soil. |
| 51 | A | Bioremediation uses microbes to metabolize pollutants like oil. |
| 52 | A | Northern blot detects RNA (gene expression) using complementary probes. |
| 53 | A | Yeast ferments sugars anaerobically to produce ethanol. |
| 54 | A | Bioreactors provide controlled conditions for large-scale microbial production. |
| 55 | A | Biopesticides are eco-friendly and specific to target pests. |
| 56 | A | Recombinant vaccines use only antigenic proteins, reducing risk of infection. |
| 57 | A | Tissue culture/micropropagation rapidly produces disease-free, uniform plants. |
| 58 | A | Rhizobium fixes atmospheric nitrogen and acts as a biofertilizer. |
| 59 | A | Horizontal gene transfer may spread GM traits to wild organisms, ecological concern. |
| 60 | A | Regulatory agencies ensure biosafety and environmental compliance of GM crops. |
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