Q. Which enzyme is crucial for converting starches into fermentable sugars in ethanol production?
-
A.
Amylase
-
B.
Cellulase
-
C.
Protease
-
D.
Lipase
Solution
Amylase is crucial for converting starches into fermentable sugars during the ethanol production process.
Correct Answer:
A
— Amylase
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Q. Which gene transfer method uses Agrobacterium tumefaciens?
-
A.
Biolistics
-
B.
Agrobacterium-mediated transformation
-
C.
Electroporation
-
D.
Microinjection
Solution
Agrobacterium-mediated transformation is a method that utilizes the natural ability of Agrobacterium tumefaciens to transfer DNA to plant cells.
Correct Answer:
B
— Agrobacterium-mediated transformation
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Q. Which ion is crucial for the opening and closing of stomata?
-
A.
Calcium
-
B.
Potassium
-
C.
Sodium
-
D.
Magnesium
Solution
Potassium ions play a key role in the turgor pressure changes that open and close stomata.
Correct Answer:
B
— Potassium
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Q. Which medium is commonly used for plant cell culture?
-
A.
Nutrient agar
-
B.
Murashige and Skoog medium
-
C.
Luria-Bertani broth
-
D.
Potato dextrose agar
Solution
Murashige and Skoog medium is a widely used nutrient medium for plant cell culture.
Correct Answer:
B
— Murashige and Skoog medium
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Q. Which medium is specifically designed for the culture of orchid tissues?
-
A.
Murashige and Skoog
-
B.
Gamborg's B5
-
C.
Orchid medium
-
D.
Nitsch and Nitsch
Solution
Orchid medium is specifically formulated to meet the unique nutritional requirements of orchid tissues.
Correct Answer:
C
— Orchid medium
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Q. Which of the following antibiotics is a beta-lactam?
-
A.
Doxycycline
-
B.
Ciprofloxacin
-
C.
Penicillin
-
D.
Clindamycin
Solution
Penicillin is a beta-lactam antibiotic that targets bacterial cell wall synthesis.
Correct Answer:
C
— Penicillin
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Q. Which of the following antibiotics is classified as a macrolide?
-
A.
Ciprofloxacin
-
B.
Azithromycin
-
C.
Vancomycin
-
D.
Amoxicillin
Solution
Azithromycin is a macrolide antibiotic that inhibits bacterial protein synthesis.
Correct Answer:
B
— Azithromycin
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Q. Which of the following antibiotics is contraindicated in pregnancy?
-
A.
Amoxicillin
-
B.
Ciprofloxacin
-
C.
Clindamycin
-
D.
Erythromycin
Solution
Ciprofloxacin is contraindicated in pregnancy due to potential risks to the fetus.
Correct Answer:
B
— Ciprofloxacin
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Q. Which of the following conditions may be aggravated by excessive vinegar consumption?
-
A.
Diabetes
-
B.
Gastroesophageal reflux disease (GERD)
-
C.
Hypertension
-
D.
Anemia
Solution
Excessive vinegar consumption can aggravate symptoms of gastroesophageal reflux disease (GERD).
Correct Answer:
B
— Gastroesophageal reflux disease (GERD)
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Q. Which of the following crops can be propagated using synthetic seeds?
-
A.
Wheat
-
B.
Rice
-
C.
Tomato
-
D.
All of the above
Solution
Synthetic seeds can be used to propagate a variety of crops, including wheat, rice, and tomato.
Correct Answer:
D
— All of the above
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Q. Which of the following diseases can be treated with monoclonal antibodies?
-
A.
Diabetes
-
B.
Asthma
-
C.
Rheumatoid arthritis
-
D.
Hypertension
Solution
Monoclonal antibodies are used to treat autoimmune diseases like rheumatoid arthritis.
Correct Answer:
C
— Rheumatoid arthritis
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Q. Which of the following is a benefit of recycling?
-
A.
Increased landfill waste
-
B.
Conservation of natural resources
-
C.
Higher energy consumption
-
D.
More pollution
Solution
Recycling helps conserve natural resources and reduces the amount of waste sent to landfills.
Correct Answer:
B
— Conservation of natural resources
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Q. Which of the following is a characteristic of monoclonal antibodies?
-
A.
They are polyclonal
-
B.
They are specific to a single epitope
-
C.
They are produced by multiple cell lines
-
D.
They have a short half-life
Solution
Monoclonal antibodies are specific to a single epitope, making them highly targeted.
Correct Answer:
B
— They are specific to a single epitope
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Q. Which of the following is a common application of biochips?
-
A.
Blood glucose monitoring
-
B.
DNA sequencing
-
C.
Protein synthesis
-
D.
Cell culture
Solution
Biochips are commonly used in DNA sequencing applications, allowing for the analysis of genetic material on a small scale.
Correct Answer:
B
— DNA sequencing
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Q. Which of the following is a common application of gene transfer in plants?
-
A.
Improving drought resistance
-
B.
Enhancing flavor
-
C.
Increasing yield
-
D.
All of the above
Solution
Gene transfer techniques are used for various applications, including improving drought resistance, enhancing flavor, and increasing yield.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common contaminant in animal cell cultures?
-
A.
Fungi
-
B.
Bacteria
-
C.
Mycoplasma
-
D.
All of the above
Solution
All of the above are common contaminants in animal cell cultures, which can adversely affect cell growth and experimental results.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common feedstock for second-generation ethanol production?
-
A.
Corn starch
-
B.
Sugarcane
-
C.
Cellulosic biomass
-
D.
Barley malt
Solution
Cellulosic biomass is a common feedstock for second-generation ethanol production, utilizing non-food plant materials.
Correct Answer:
C
— Cellulosic biomass
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Q. Which of the following is a common health effect of air pollution?
-
A.
Increased bone density
-
B.
Respiratory diseases
-
C.
Improved cardiovascular health
-
D.
Enhanced immune response
Solution
Air pollution is linked to various respiratory diseases, including asthma and chronic bronchitis.
Correct Answer:
B
— Respiratory diseases
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Q. Which of the following is a common method for creating transgenic plants?
-
A.
Gene editing using CRISPR
-
B.
Traditional crossbreeding
-
C.
Hydroponics
-
D.
Soil amendment
Solution
Gene editing using CRISPR is a common method for creating transgenic plants by directly modifying the plant's DNA.
Correct Answer:
A
— Gene editing using CRISPR
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Q. Which of the following is a common method for initiating plant cell culture?
-
A.
Seed germination
-
B.
Cutting and grafting
-
C.
Tissue explantation
-
D.
Soil planting
Solution
Tissue explantation is a common method for initiating plant cell culture, where small pieces of plant tissue are used to grow new plants.
Correct Answer:
C
— Tissue explantation
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Q. Which of the following is a common method for plant genetic transformation?
-
A.
Microinjection
-
B.
Electroporation
-
C.
Agrobacterium-mediated transformation
-
D.
All of the above
Solution
All of the listed methods are used for transforming plant cells genetically.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common method for plant tissue culture?
-
A.
Micropropagation
-
B.
Hydroponics
-
C.
Aeroponics
-
D.
Xeriscaping
Solution
Micropropagation is a common method used in plant tissue culture to produce large numbers of plants from a small tissue sample.
Correct Answer:
A
— Micropropagation
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Q. Which of the following is a common method for synthesizing therapeutic agents?
-
A.
Biotransformation
-
B.
Polymerization
-
C.
Hydrolysis
-
D.
Electrolysis
Solution
Biotransformation is a common method used in the synthesis of therapeutic agents.
Correct Answer:
A
— Biotransformation
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Q. Which of the following is a common selectable marker used in plant gene transfer?
-
A.
Kanamycin resistance
-
B.
Ampicillin resistance
-
C.
Tetracycline resistance
-
D.
Streptomycin resistance
Solution
Kanamycin resistance is commonly used as a selectable marker in plant gene transfer to identify successfully transformed cells.
Correct Answer:
A
— Kanamycin resistance
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Q. Which of the following is a common source of citric acid?
-
A.
Lemons
-
B.
Vinegar
-
C.
Honey
-
D.
Salt
Solution
Lemons are a well-known source of citric acid, which is abundant in citrus fruits.
Correct Answer:
A
— Lemons
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Q. Which of the following is a common source of explants for plant cell culture?
-
A.
Roots
-
B.
Leaves
-
C.
Seeds
-
D.
All of the above
Solution
All of the above (roots, leaves, and seeds) can serve as common sources of explants for plant cell culture.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common type of cloning vector?
-
A.
Plasmids
-
B.
Ribosomes
-
C.
Chromosomes
-
D.
Nucleotides
Solution
Plasmids are one of the most common types of cloning vectors used in molecular biology.
Correct Answer:
A
— Plasmids
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Q. Which of the following is a common type of medium used for animal cell culture?
-
A.
Nutrient agar
-
B.
Luria-Bertani broth
-
C.
Dulbecco's Modified Eagle Medium (DMEM)
-
D.
Potato dextrose agar
Solution
Dulbecco's Modified Eagle Medium (DMEM) is a widely used culture medium for animal cells, providing essential nutrients.
Correct Answer:
C
— Dulbecco's Modified Eagle Medium (DMEM)
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Q. Which of the following is a common use of citric acid in food preservation?
-
A.
Enhancing flavor
-
B.
Coloring agent
-
C.
pH adjustment
-
D.
Sweetening agent
Solution
Citric acid is often used in food preservation to adjust pH, which helps inhibit microbial growth.
Correct Answer:
C
— pH adjustment
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Q. Which of the following is a common use of monoclonal antibodies in cancer treatment?
-
A.
Chemotherapy
-
B.
Radiation therapy
-
C.
Targeted therapy
-
D.
Surgery
Solution
Monoclonal antibodies are often used in targeted therapy to specifically attack cancer cells.
Correct Answer:
C
— Targeted therapy
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