Q. Which of the following is a method of controlling microbial growth in food? (2022)
A.
Refrigeration
B.
Boiling
C.
Canning
D.
All of the above
Show solution
Solution
All of the mentioned methods are effective in controlling microbial growth in food.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method of gene therapy? (2021)
A.
Using antibiotics
B.
Inserting a healthy gene into a patient's cells
C.
Cloning
D.
Creating genetically modified crops
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Solution
Gene therapy involves inserting a healthy gene into a patient's cells to treat genetic disorders.
Correct Answer:
B
— Inserting a healthy gene into a patient's cells
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Q. Which of the following is a method of heat transfer?
A.
Conduction
B.
Convection
C.
Radiation
D.
All of the above
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Solution
Conduction, convection, and radiation are all methods of heat transfer.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method of hydrogen production? (2023)
A.
Electrolysis of water
B.
Steam reforming of natural gas
C.
Thermochemical water splitting
D.
All of the above
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Solution
Hydrogen can be produced through various methods including electrolysis of water, steam reforming of natural gas, and thermochemical water splitting.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method of in-situ conservation? (2019)
A.
Botanical gardens
B.
Seed banks
C.
Wildlife sanctuaries
D.
Zoos
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Solution
Wildlife sanctuaries are a method of in-situ conservation as they protect species in their natural habitats.
Correct Answer:
C
— Wildlife sanctuaries
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Q. Which of the following is a method of preserving food using microbes? (2022)
A.
Canning
B.
Freezing
C.
Fermentation
D.
Drying
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Solution
Fermentation is a method of preserving food by using microbes to produce acids or alcohol that inhibit spoilage.
Correct Answer:
C
— Fermentation
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Q. Which of the following is a method of preventing the spread of infectious diseases? (2022)
A.
Vaccination
B.
Eating healthy
C.
Drinking water
D.
Exercising
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Solution
Vaccination is a key method for preventing the spread of infectious diseases by building immunity.
Correct Answer:
A
— Vaccination
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Q. Which of the following is a method of producing insulin using biotechnology? (2018)
A.
Fermentation
B.
Hybridization
C.
Cloning
D.
Cross-breeding
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Solution
Insulin is produced using fermentation processes involving genetically modified bacteria.
Correct Answer:
A
— Fermentation
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Q. Which of the following is a method of using microbes for waste treatment? (2023)
A.
Incineration
B.
Composting
C.
Landfilling
D.
Chemical treatment
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Solution
Composting utilizes microbes to decompose organic waste into nutrient-rich compost.
Correct Answer:
B
— Composting
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Q. Which of the following is a method of using microbes to clean up the environment? (2023)
A.
Bioremediation
B.
Vaccination
C.
Pasteurization
D.
Fermentation
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Solution
Bioremediation is the process of using microbes to clean up contaminated environments.
Correct Answer:
A
— Bioremediation
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Q. Which of the following is a method of vegetative propagation? (2023)
A.
Cutting
B.
Budding
C.
Binary fission
D.
All of the above
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Solution
Cutting is a method of vegetative propagation where a part of the plant is cut and planted to grow a new plant.
Correct Answer:
A
— Cutting
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Q. Which of the following is a method of water transport in plants?
A.
Cohesion
B.
Adhesion
C.
Both cohesion and adhesion
D.
None of the above
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Solution
Both cohesion (water molecules sticking to each other) and adhesion (water molecules sticking to other surfaces) are important for water transport in plants.
Correct Answer:
C
— Both cohesion and adhesion
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Q. Which of the following is a method to calculate GDP? (2023)
A.
Income method
B.
Expenditure method
C.
Production method
D.
All of the above
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Solution
All of the above methods can be used to calculate GDP.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method to distinguish between aldehydes and ketones?
A.
Benedict's test
B.
Tollens' test
C.
Iodoform test
D.
Fehling's test
Show solution
Solution
Tollens' test can be used to distinguish between aldehydes and ketones, as aldehydes reduce Tollens' reagent.
Correct Answer:
B
— Tollens' test
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Q. Which of the following is a method to prepare aldehydes?
A.
Hydration of alkynes
B.
Hydrolysis of nitriles
C.
Oxidation of primary alcohols
D.
All of the above
Show solution
Solution
All of the listed methods can be used to prepare aldehydes.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method to prepare haloalkanes?
A.
Hydrogenation of alkenes
B.
Halogenation of alkanes
C.
Dehydrohalogenation
D.
Hydrolysis of alcohols
Show solution
Solution
Haloalkanes can be prepared by the halogenation of alkanes, which involves the substitution of hydrogen by halogen.
Correct Answer:
B
— Halogenation of alkanes
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Q. Which of the following is a method to protect your email account?
A.
Using a strong password
B.
Sharing your password
C.
Using the same password for all accounts
D.
Ignoring security updates
Show solution
Solution
Using a strong password is a key method to protect your email account from unauthorized access.
Correct Answer:
A
— Using a strong password
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Q. Which of the following is a method to reduce air pollution?
A.
Using public transport
B.
Burning fossil fuels
C.
Deforestation
D.
Increasing industrial emissions
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Solution
Using public transport helps reduce the number of vehicles on the road, thereby decreasing air pollution.
Correct Answer:
A
— Using public transport
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Q. Which of the following is a method to reduce carbon footprint? (2020)
A.
Using fossil fuels
B.
Increasing energy efficiency
C.
Deforestation
D.
Burning waste
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Solution
Increasing energy efficiency helps to reduce carbon emissions and thus lowers the carbon footprint.
Correct Answer:
B
— Increasing energy efficiency
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Q. Which of the following is a method to reduce water pollution?
A.
Using biodegradable materials
B.
Increasing industrial waste discharge
C.
Reducing vegetation
D.
None of the above
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Solution
Using biodegradable materials helps reduce water pollution by minimizing the impact of waste on aquatic ecosystems.
Correct Answer:
A
— Using biodegradable materials
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Q. Which of the following is a method to solve a quadratic equation?
A.
Graphical method
B.
Completing the square
C.
Quadratic formula
D.
All of the above
Show solution
Solution
All of the mentioned methods can be used to solve a quadratic equation.
Correct Answer:
D
— All of the above
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Q. Which of the following is a method used for cloning in biotechnology? (2019)
A.
Somatic cell nuclear transfer
B.
Polymerase chain reaction
C.
Gel electrophoresis
D.
DNA sequencing
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Solution
Somatic cell nuclear transfer is a method used for cloning, where the nucleus of a somatic cell is transferred to an egg cell.
Correct Answer:
A
— Somatic cell nuclear transfer
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Q. Which of the following is a method used for cloning in plants? (2022)
A.
Micropropagation
B.
Electroporation
C.
Transfection
D.
PCR
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Solution
Micropropagation is a method used for cloning plants by growing them from small tissue samples in a controlled environment.
Correct Answer:
A
— Micropropagation
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Q. Which of the following is a method used for gene cloning? (2023)
A.
PCR
B.
Gel electrophoresis
C.
DNA sequencing
D.
All of the above
Show solution
Solution
PCR (Polymerase Chain Reaction) is a method used for amplifying DNA, which is essential in gene cloning.
Correct Answer:
A
— PCR
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Q. Which of the following is a method used for gene editing? (2021)
A.
PCR
B.
CRISPR-Cas9
C.
Gel electrophoresis
D.
DNA sequencing
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Solution
CRISPR-Cas9 is a revolutionary gene editing technology that allows for precise modifications to DNA.
Correct Answer:
B
— CRISPR-Cas9
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Q. Which of the following is a method used for gene transfer in plants? (2021)
A.
Microinjection
B.
Electroporation
C.
Agrobacterium-mediated transformation
D.
All of the above
Show solution
Solution
Agrobacterium-mediated transformation is a widely used method for transferring genes into plant cells, making it a key technique in plant biotechnology.
Correct Answer:
C
— Agrobacterium-mediated transformation
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Q. Which of the following is a method used for the production of genetically modified organisms? (2023)
A.
Polymerase chain reaction
B.
Microinjection
C.
Gel electrophoresis
D.
Cloning
Show solution
Solution
Microinjection is a method used to introduce foreign DNA into the cells of an organism, facilitating the creation of genetically modified organisms.
Correct Answer:
B
— Microinjection
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Q. Which of the following is a method used for the production of insulin? (2022)
A.
Fermentation
B.
Transcription
C.
Translation
D.
Photosynthesis
Show solution
Solution
Insulin is produced using fermentation processes involving genetically modified bacteria that express the insulin gene.
Correct Answer:
A
— Fermentation
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Q. Which of the following is a method used for the production of monoclonal antibodies? (2022)
A.
Hybridoma technology
B.
Gene cloning
C.
PCR
D.
DNA sequencing
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Solution
Hybridoma technology is the method used for the production of monoclonal antibodies by fusing myeloma cells with specific immune cells.
Correct Answer:
A
— Hybridoma technology
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Q. Which of the following is a method used for the production of transgenic animals? (2023)
A.
Microinjection
B.
Electroporation
C.
Gene gun
D.
All of the above
Show solution
Solution
Microinjection, electroporation, and gene gun techniques are all methods used to produce transgenic animals.
Correct Answer:
D
— All of the above
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