Q. What is the significance of the CRISPR-Cas9 technology in plant genetics?
-
A.
It allows for the cloning of plants
-
B.
It enables precise gene editing
-
C.
It increases plant growth rate
-
D.
It enhances photosynthetic efficiency
Solution
CRISPR-Cas9 is a revolutionary tool that allows for precise editing of plant genomes.
Correct Answer:
B
— It enables precise gene editing
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Q. What is the significance of the nitrogen cycle in ecosystems?
-
A.
It helps in energy transfer
-
B.
It recycles nutrients
-
C.
It increases carbon dioxide levels
-
D.
It reduces soil acidity
Solution
The nitrogen cycle is crucial for recycling nitrogen in various forms, making it available for plant use.
Correct Answer:
B
— It recycles nutrients
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Q. What is the significance of the polymerase chain reaction (PCR) in recombinant DNA technology?
-
A.
It cuts DNA into fragments
-
B.
It amplifies specific DNA sequences
-
C.
It joins DNA fragments
-
D.
It sequences DNA
Solution
PCR is significant because it amplifies specific DNA sequences, making it easier to work with small amounts of DNA.
Correct Answer:
B
— It amplifies specific DNA sequences
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Q. What is the term for animals that have had their genome altered by the transfer of a gene from another species?
-
A.
Cloned animals
-
B.
Transgenic animals
-
C.
Hybrid animals
-
D.
Genetically modified organisms
Solution
Transgenic animals are those that have had their genome altered by the transfer of a gene from another species.
Correct Answer:
B
— Transgenic animals
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Q. What is the term for the process of creating genetically modified animals?
-
A.
Cloning
-
B.
Transgenesis
-
C.
Selective breeding
-
D.
Hybridization
Solution
Transgenesis is the process of introducing foreign DNA into an animal's genome to create genetically modified organisms.
Correct Answer:
B
— Transgenesis
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Q. What is the term for the process of growing plant cells in a controlled environment?
-
A.
Hydroponics
-
B.
Tissue culture
-
C.
Aeroponics
-
D.
Xenobiotics
Solution
Tissue culture is the process of growing plant cells in a controlled environment.
Correct Answer:
B
— Tissue culture
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Q. What is the typical alcohol content of fermented beverages produced through ethanol fermentation?
-
A.
1-5%
-
B.
5-15%
-
C.
15-25%
-
D.
25-40%
Solution
The typical alcohol content of fermented beverages produced through ethanol fermentation ranges from 5-15%.
Correct Answer:
B
— 5-15%
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Q. What is the typical concentration of acetic acid in household vinegar?
-
A.
5-20%
-
B.
1-3%
-
C.
30-50%
-
D.
50-70%
Solution
Household vinegar typically contains 5-20% acetic acid.
Correct Answer:
A
— 5-20%
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Q. What is the typical pH range for animal cell culture media?
-
A.
4.0 - 5.0
-
B.
6.5 - 7.5
-
C.
8.0 - 9.0
-
D.
10.0 - 11.0
Solution
The typical pH range for animal cell culture media is 6.5 to 7.5, which is optimal for cell growth and function.
Correct Answer:
B
— 6.5 - 7.5
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Q. What phase of the cell cycle is characterized by DNA replication?
-
A.
G1 phase
-
B.
S phase
-
C.
G2 phase
-
D.
M phase
Solution
The S phase is where DNA replication occurs, resulting in the duplication of chromosomes.
Correct Answer:
B
— S phase
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Q. What regulatory body typically oversees the approval of transgenic plants?
-
A.
Environmental Protection Agency (EPA)
-
B.
Food and Drug Administration (FDA)
-
C.
United States Department of Agriculture (USDA)
-
D.
All of the above
Solution
In the United States, the approval of transgenic plants is overseen by multiple agencies, including the EPA, FDA, and USDA.
Correct Answer:
D
— All of the above
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Q. What role do enzymes play in the synthesis of therapeutic agents?
-
A.
They act as catalysts
-
B.
They inhibit reactions
-
C.
They are the final product
-
D.
They are not involved
Solution
Enzymes act as catalysts to speed up the synthesis of therapeutic agents.
Correct Answer:
A
— They act as catalysts
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Q. What role does agar play in plant cell culture media?
-
A.
Nutrient source
-
B.
pH stabilizer
-
C.
Solidifying agent
-
D.
Growth regulator
Solution
Agar serves as a solidifying agent in plant cell culture media, providing a stable surface for cell growth.
Correct Answer:
C
— Solidifying agent
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Q. What role does the T-DNA region play in Agrobacterium-mediated gene transfer?
-
A.
It carries the gene of interest
-
B.
It provides antibiotic resistance
-
C.
It facilitates cell division
-
D.
It enhances photosynthesis
Solution
The T-DNA region of the Agrobacterium plasmid carries the gene of interest that is transferred into the plant cell.
Correct Answer:
A
— It carries the gene of interest
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Q. What type of biosensor uses an enzyme as the bioreceptor?
-
A.
Immunosensor
-
B.
Enzyme-based biosensor
-
C.
DNA biosensor
-
D.
Electrochemical biosensor
Solution
An enzyme-based biosensor utilizes enzymes as bioreceptors to catalyze reactions with specific substrates, leading to measurable signals.
Correct Answer:
B
— Enzyme-based biosensor
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Q. What type of immune response do monoclonal antibodies primarily elicit?
-
A.
Innate immune response
-
B.
Adaptive immune response
-
C.
Inflammatory response
-
D.
Autoimmune response
Solution
Monoclonal antibodies primarily elicit an adaptive immune response by targeting specific antigens.
Correct Answer:
B
— Adaptive immune response
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Q. Which animal is commonly used as a model organism in genetic studies?
-
A.
Dog
-
B.
Mouse
-
C.
Cat
-
D.
Horse
Solution
The mouse is widely used as a model organism in genetic studies due to its genetic similarity to humans and short reproductive cycle.
Correct Answer:
B
— Mouse
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Q. Which animal is most commonly used for transgenic research?
-
A.
Dogs
-
B.
Cats
-
C.
Mice
-
D.
Rabbits
Solution
Mice are the most commonly used animals in transgenic research due to their genetic similarity to humans and short reproductive cycles.
Correct Answer:
C
— Mice
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Q. Which antibiotic is effective against anaerobic bacteria?
-
A.
Cefazolin
-
B.
Metronidazole
-
C.
Amoxicillin
-
D.
Azithromycin
Solution
Metronidazole is effective against anaerobic bacteria and is often used for such infections.
Correct Answer:
B
— Metronidazole
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Q. Which antibiotic is often used to treat MRSA infections?
-
A.
Ceftriaxone
-
B.
Clindamycin
-
C.
Amoxicillin
-
D.
Gentamicin
Solution
Clindamycin is commonly used to treat infections caused by MRSA.
Correct Answer:
B
— Clindamycin
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Q. Which biotechnology technique is used to amplify small segments of DNA?
-
A.
Gene cloning
-
B.
PCR (Polymerase Chain Reaction)
-
C.
DNA sequencing
-
D.
Electrophoresis
Solution
PCR (Polymerase Chain Reaction) is the technique used to amplify small segments of DNA.
Correct Answer:
B
— PCR (Polymerase Chain Reaction)
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Q. Which checkpoint is crucial for preventing the division of cells with damaged DNA?
-
A.
G1 checkpoint
-
B.
S checkpoint
-
C.
G2 checkpoint
-
D.
M checkpoint
Solution
The G2 checkpoint is crucial for preventing the division of cells with damaged DNA by ensuring all DNA is intact before mitosis.
Correct Answer:
C
— G2 checkpoint
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Q. Which component in wine is primarily responsible for its antioxidant properties?
-
A.
Tannins
-
B.
Sugars
-
C.
Acids
-
D.
Alcohol
Solution
Tannins are polyphenolic compounds in wine that contribute to its antioxidant properties.
Correct Answer:
A
— Tannins
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Q. Which component is commonly added to plant tissue culture media to promote shoot regeneration?
-
A.
Agar
-
B.
Cytokinins
-
C.
Sucrose
-
D.
Gibberellins
Solution
Cytokinins are plant hormones that promote cell division and are commonly used to enhance shoot regeneration in plant tissue culture.
Correct Answer:
B
— Cytokinins
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Q. Which component of a biosensor is responsible for the recognition of the target analyte?
-
A.
Transducer
-
B.
Bioreceptor
-
C.
Signal processor
-
D.
Display unit
Solution
The bioreceptor is the component that specifically recognizes and binds to the target analyte in a biosensor.
Correct Answer:
B
— Bioreceptor
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Q. Which disorder involves a fear of social situations?
-
A.
Agoraphobia
-
B.
Social anxiety disorder
-
C.
Specific phobia
-
D.
Generalized anxiety disorder
Solution
Social anxiety disorder is characterized by an intense fear of social situations where one may be judged or scrutinized.
Correct Answer:
B
— Social anxiety disorder
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Q. Which disorder is characterized by a fear of being in situations where escape might be difficult?
-
A.
Panic disorder
-
B.
Agoraphobia
-
C.
Social anxiety disorder
-
D.
Specific phobia
Solution
Agoraphobia is characterized by a fear of being in situations where escape might be difficult or help unavailable.
Correct Answer:
B
— Agoraphobia
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Q. Which disorder is characterized by episodes of extreme mood swings?
-
A.
Bipolar disorder
-
B.
Major depressive disorder
-
C.
Anxiety disorder
-
D.
Schizophrenia
Solution
Bipolar disorder is characterized by episodes of extreme mood swings, including manic and depressive episodes.
Correct Answer:
A
— Bipolar disorder
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Q. Which disorder is characterized by excessive worry about various aspects of life?
-
A.
Panic disorder
-
B.
Generalized anxiety disorder
-
C.
Social anxiety disorder
-
D.
Post-traumatic stress disorder
Solution
Generalized anxiety disorder is characterized by excessive and uncontrollable worry about multiple aspects of life.
Correct Answer:
B
— Generalized anxiety disorder
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Q. Which enzyme is commonly used to insert DNA fragments into cloning vectors?
-
A.
Ligase
-
B.
Polymerase
-
C.
Restriction enzyme
-
D.
Helicase
Solution
DNA ligase is commonly used to insert DNA fragments into cloning vectors by joining the DNA ends.
Correct Answer:
A
— Ligase
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