Q. During which phase do cells prepare for mitosis?
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
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Solution
The G2 phase is the period where the cell prepares for mitosis, ensuring all DNA is replicated and the cell is ready to divide.
Correct Answer:
C
— G2 phase
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Q. How are monoclonal antibodies typically produced?
A.
By recombinant DNA technology
B.
By chemical synthesis
C.
By fermentation
D.
By natural extraction
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Solution
Monoclonal antibodies are typically produced using recombinant DNA technology.
Correct Answer:
A
— By recombinant DNA technology
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Q. How do special proteins contribute to the nutritional quality of crops?
A.
By increasing fiber content
B.
By enhancing vitamin synthesis
C.
By reducing calorie count
D.
By improving taste
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Solution
Special proteins can enhance the synthesis of vitamins, improving the overall nutritional quality of crops.
Correct Answer:
B
— By enhancing vitamin synthesis
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Q. How do synthetic seeds contribute to food security?
A.
By reducing crop diversity
B.
By enabling rapid propagation of high-yield varieties
C.
By increasing reliance on chemical inputs
D.
By promoting monoculture farming
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Solution
Synthetic seeds enable rapid propagation of high-yield varieties, which can contribute to food security.
Correct Answer:
B
— By enabling rapid propagation of high-yield varieties
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Q. How many pairs of chromosomes do most domestic animals have?
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Solution
Most domestic animals, including humans, have 23 pairs of chromosomes, totaling 46 chromosomes.
Correct Answer:
B
— 23
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Q. What are synthetic seeds primarily used for?
A.
To enhance soil fertility
B.
To propagate plants without seeds
C.
To increase crop yield
D.
To improve pest resistance
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Solution
Synthetic seeds are used to propagate plants without the need for traditional seeds, allowing for the cloning of plants.
Correct Answer:
B
— To propagate plants without seeds
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Q. What compound in red wine is thought to have cardioprotective effects?
A.
Resveratrol
B.
Caffeine
C.
Quercetin
D.
Flavonoids
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Solution
Resveratrol is a compound in red wine that is thought to have cardioprotective effects.
Correct Answer:
A
— Resveratrol
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Q. What effect does citric acid have on the flavor of food?
A.
Bitter
B.
Sour
C.
Sweet
D.
Savory
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Solution
Citric acid imparts a sour flavor to food, enhancing its taste profile.
Correct Answer:
B
— Sour
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Q. What feature do cloning vectors typically contain to facilitate selection?
A.
Antibiotic resistance genes
B.
Introns
C.
Exons
D.
Promoters
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Solution
Cloning vectors usually contain antibiotic resistance genes to allow for the selection of successfully transformed cells.
Correct Answer:
A
— Antibiotic resistance genes
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Q. What happens during the G0 phase?
A.
Cells prepare for division
B.
Cells exit the cell cycle and enter a quiescent state
C.
Cells undergo DNA replication
D.
Cells actively divide
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Solution
During the G0 phase, cells exit the cell cycle and enter a quiescent state, where they are metabolically active but not dividing.
Correct Answer:
B
— Cells exit the cell cycle and enter a quiescent state
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Q. What is a common application of transgenic mice in research?
A.
Studying aging processes
B.
Testing new drugs
C.
Understanding genetic diseases
D.
All of the above
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Solution
Transgenic mice are used in various research applications, including studying aging processes, testing new drugs, and understanding genetic diseases.
Correct Answer:
D
— All of the above
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Q. What is a common challenge associated with using viral vectors in animal cell culture?
A.
Low transfection efficiency
B.
Immune response from the host
C.
High cost of production
D.
Limited insert size
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Solution
A significant challenge with viral vectors is the potential immune response from the host, which can limit their effectiveness.
Correct Answer:
B
— Immune response from the host
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Q. What is a common challenge in the synthesis of complex therapeutic agents?
A.
High yield
B.
Selectivity of reactions
C.
Cost-effectiveness
D.
Stability of intermediates
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Solution
Selectivity of reactions is a common challenge in synthesizing complex therapeutic agents.
Correct Answer:
B
— Selectivity of reactions
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Q. What is a common concern regarding transgenic plants?
A.
Increased biodiversity
B.
Potential for gene transfer to wild relatives
C.
Higher nutritional value
D.
Reduced pesticide use
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Solution
A common concern regarding transgenic plants is the potential for gene transfer to wild relatives, which could disrupt local ecosystems.
Correct Answer:
B
— Potential for gene transfer to wild relatives
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Q. What is a common consequence of chromosomal abnormalities in animals?
A.
Increased lifespan
B.
Enhanced fertility
C.
Genetic disorders
D.
Improved immunity
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Solution
Chromosomal abnormalities can lead to genetic disorders, affecting the health and development of the affected animals.
Correct Answer:
C
— Genetic disorders
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Q. What is a common feature of plasmid vectors used in animal cell culture?
A.
Ability to replicate independently
B.
Inability to carry antibiotic resistance genes
C.
Lack of a promoter region
D.
High molecular weight
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Solution
Plasmid vectors can replicate independently within the host cell, which is essential for gene cloning and expression.
Correct Answer:
A
— Ability to replicate independently
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Q. What is a common side effect of tetracycline antibiotics?
A.
Nausea
B.
Photosensitivity
C.
Diarrhea
D.
Rash
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Solution
Photosensitivity is a well-known side effect of tetracycline antibiotics.
Correct Answer:
B
— Photosensitivity
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Q. What is a common symptom of obsessive-compulsive disorder (OCD)?
A.
Compulsive eating
B.
Repetitive hand washing
C.
Extreme shyness
D.
Chronic fatigue
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Solution
A common symptom of OCD is repetitive behaviors, such as excessive hand washing, driven by obsessive thoughts.
Correct Answer:
B
— Repetitive hand washing
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Q. What is a common treatment for attention-deficit/hyperactivity disorder (ADHD)?
A.
Antidepressants
B.
Stimulant medications
C.
Antipsychotics
D.
Mood stabilizers
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Solution
Stimulant medications are commonly used to treat ADHD by helping to increase attention and decrease impulsivity.
Correct Answer:
B
— Stimulant medications
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Q. What is a key advantage of using microfluidic biochips?
A.
High cost
B.
Large sample volume
C.
Reduced reagent consumption
D.
Complex manufacturing process
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Solution
Microfluidic biochips allow for reduced reagent consumption by manipulating small volumes of fluids, making them cost-effective and efficient.
Correct Answer:
C
— Reduced reagent consumption
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Q. What is a key advantage of using yeast artificial chromosomes (YACs) as cloning vectors?
A.
Ability to clone large DNA fragments
B.
High transformation efficiency
C.
Low cost
D.
Simple construction
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Solution
Yeast artificial chromosomes (YACs) can clone large DNA fragments, making them useful for genomic studies.
Correct Answer:
A
— Ability to clone large DNA fragments
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Q. What is a major advantage of using synthetic seeds?
A.
They require more water
B.
They can be stored for longer periods
C.
They are more susceptible to diseases
D.
They are less expensive to produce
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Solution
Synthetic seeds can be stored for longer periods compared to traditional seeds, making them advantageous for agricultural use.
Correct Answer:
B
— They can be stored for longer periods
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Q. What is a potential benefit of transgenic livestock?
A.
Higher meat quality
B.
Increased disease susceptibility
C.
Longer gestation periods
D.
Reduced feed efficiency
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Solution
Transgenic livestock can be engineered for higher meat quality, among other benefits such as disease resistance.
Correct Answer:
A
— Higher meat quality
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Q. What is a potential drawback of synthetic seeds?
A.
They are environmentally friendly
B.
They can be expensive to produce
C.
They require less labor
D.
They are easy to store
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Solution
One potential drawback of synthetic seeds is that they can be expensive to produce compared to traditional seeds.
Correct Answer:
B
— They can be expensive to produce
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Q. What is a potential health benefit of consuming vinegar?
A.
Lowering blood sugar levels
B.
Increasing cholesterol levels
C.
Dehydration
D.
Weight gain
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Solution
Some studies suggest that vinegar may help lower blood sugar levels after meals.
Correct Answer:
A
— Lowering blood sugar levels
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Q. What is a potential risk associated with the cultivation of transgenic crops?
A.
Increased crop yields
B.
Development of resistant pests
C.
Improved nutritional content
D.
Lower production costs
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Solution
A potential risk associated with the cultivation of transgenic crops is the development of resistant pests, which can lead to increased pest management challenges.
Correct Answer:
B
— Development of resistant pests
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Q. What is a potential side effect of monoclonal antibody therapy?
A.
Weight gain
B.
Infusion reactions
C.
Increased appetite
D.
Hair loss
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Solution
Infusion reactions are a common side effect of monoclonal antibody therapy.
Correct Answer:
B
— Infusion reactions
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Q. What is a serious side effect associated with the use of aminoglycosides?
A.
Hepatotoxicity
B.
Nephrotoxicity
C.
Cardiotoxicity
D.
Ototoxicity
Show solution
Solution
Aminoglycosides can cause ototoxicity, leading to hearing loss.
Correct Answer:
D
— Ototoxicity
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Q. What is a significant source of indoor air pollution?
A.
Outdoor plants
B.
Radon gas
C.
Fresh air ventilation
D.
Natural sunlight
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Solution
Radon gas is a significant source of indoor air pollution and can pose health risks.
Correct Answer:
B
— Radon gas
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Q. What is a transgenic organism?
A.
An organism with DNA from the same species
B.
An organism that has been genetically modified to contain DNA from another species
C.
An organism that has not been genetically modified
D.
An organism that only reproduces asexually
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Solution
A transgenic organism is one that has been genetically modified to contain DNA from another species.
Correct Answer:
B
— An organism that has been genetically modified to contain DNA from another species
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