Q. What is a transgenic plant?
-
A.
A plant with enhanced photosynthesis
-
B.
A plant that has been genetically modified to contain DNA from another species
-
C.
A plant that grows in extreme conditions
-
D.
A plant that is resistant to all diseases
Solution
A transgenic plant is one that has been genetically modified to contain DNA from another species.
Correct Answer:
B
— A plant that has been genetically modified to contain DNA from another species
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Q. What is one potential benefit of transgenic plants?
-
A.
Increased resistance to pests
-
B.
Higher water consumption
-
C.
Reduced growth rate
-
D.
Increased soil erosion
Solution
One potential benefit of transgenic plants is increased resistance to pests, which can lead to higher crop yields.
Correct Answer:
A
— Increased resistance to pests
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Q. What is the average alcohol by volume (ABV) percentage in most beers?
-
A.
2-4%
-
B.
4-6%
-
C.
6-8%
-
D.
8-10%
Solution
Most beers typically have an alcohol by volume (ABV) percentage of 4-6%.
Correct Answer:
B
— 4-6%
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Q. What is the benefit of using special proteins in biofortification?
-
A.
Increased yield
-
B.
Enhanced flavor
-
C.
Improved disease resistance
-
D.
Higher nutrient content
Solution
Biofortification aims to increase the nutrient content of crops, often through the introduction of special proteins.
Correct Answer:
D
— Higher nutrient content
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Q. What is the effect of moderate wine consumption on heart health?
-
A.
Increases risk
-
B.
No effect
-
C.
Decreases risk
-
D.
Only harmful for women
Solution
Moderate wine consumption has been associated with a decreased risk of heart disease.
Correct Answer:
C
— Decreases risk
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Q. What is the function of antifreeze proteins in crops?
-
A.
Preventing freezing damage
-
B.
Enhancing nutrient uptake
-
C.
Increasing growth rate
-
D.
Improving flavor profile
Solution
Antifreeze proteins prevent freezing damage by lowering the freezing point of water in plant cells.
Correct Answer:
A
— Preventing freezing damage
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Q. What is the function of auxins in plant cell culture?
-
A.
Promote cell elongation
-
B.
Stimulate root formation
-
C.
Enhance flowering
-
D.
Inhibit growth
Solution
Auxins are plant hormones that primarily promote cell elongation and are crucial for root formation in plant tissue culture.
Correct Answer:
B
— Stimulate root formation
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Q. What is the function of the cuticle in plants?
-
A.
Photosynthesis
-
B.
Water retention
-
C.
Nutrient absorption
-
D.
Support
Solution
The cuticle helps in water retention by providing a protective layer on the surface of leaves.
Correct Answer:
B
— Water retention
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Q. What is the function of trypsin in cell culture?
-
A.
To promote cell growth
-
B.
To detach adherent cells from the culture surface
-
C.
To provide nutrients
-
D.
To buffer the medium
Solution
Trypsin is an enzyme used to detach adherent cells from the culture surface, allowing for passaging and subculturing.
Correct Answer:
B
— To detach adherent cells from the culture surface
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Q. What is the hallmark symptom of major depressive disorder?
-
A.
Increased energy
-
B.
Persistent sadness
-
C.
Euphoria
-
D.
Hyperactivity
Solution
The hallmark symptom of major depressive disorder is persistent sadness or a low mood that lasts for most of the day, nearly every day.
Correct Answer:
B
— Persistent sadness
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Q. What is the impact of special proteins on crop yield?
-
A.
No impact
-
B.
Decreases yield
-
C.
Increases yield
-
D.
Varies by crop type
Solution
Special proteins can significantly increase crop yield by enhancing stress tolerance and nutrient uptake.
Correct Answer:
C
— Increases yield
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Q. What is the main advantage of using CRISPR-Cas9 in plant gene editing?
-
A.
High precision
-
B.
Low cost
-
C.
No need for selectable markers
-
D.
All of the above
Solution
CRISPR-Cas9 offers high precision, is relatively low cost, and can be designed to work without selectable markers.
Correct Answer:
D
— All of the above
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Q. What is the main advantage of using monoclonal antibodies in medicine?
-
A.
They are less expensive
-
B.
They target specific antigens
-
C.
They can be produced quickly
-
D.
They have fewer side effects
Solution
Monoclonal antibodies are advantageous because they can be engineered to target specific antigens, improving treatment efficacy.
Correct Answer:
B
— They target specific antigens
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Q. What is the main advantage of using plant cell culture for genetic engineering?
-
A.
It allows for the production of larger plants
-
B.
It enables the introduction of foreign genes
-
C.
It reduces the need for fertilizers
-
D.
It increases the growth rate of plants
Solution
The main advantage of using plant cell culture for genetic engineering is that it enables the introduction of foreign genes into plant cells.
Correct Answer:
B
— It enables the introduction of foreign genes
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Q. What is the main byproduct of ethanol fermentation?
-
A.
Carbon dioxide
-
B.
Methane
-
C.
Hydrogen sulfide
-
D.
Acetic acid
Solution
The main byproduct of ethanol fermentation is carbon dioxide, which is released during the process.
Correct Answer:
A
— Carbon dioxide
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Q. What is the main component of chromosomes?
-
A.
RNA
-
B.
Proteins
-
C.
Lipids
-
D.
DNA
Solution
DNA is the main component of chromosomes, carrying the genetic instructions for the development and functioning of living organisms.
Correct Answer:
D
— DNA
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Q. What is the main ethical concern associated with gene editing in humans?
-
A.
Cost of treatment
-
B.
Potential for designer babies
-
C.
Availability of technology
-
D.
Public acceptance
Solution
The main ethical concern with gene editing in humans is the potential for creating 'designer babies' with selected traits.
Correct Answer:
B
— Potential for designer babies
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Q. What is the main greenhouse gas emitted by human activities?
-
A.
Ozone
-
B.
Carbon dioxide
-
C.
Methane
-
D.
Nitrous oxide
Solution
Carbon dioxide is the primary greenhouse gas emitted through human activities, particularly from burning fossil fuels.
Correct Answer:
B
— Carbon dioxide
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Q. What is the main purpose of root hairs in plants?
-
A.
Photosynthesis
-
B.
Water absorption
-
C.
Nutrient storage
-
D.
Gas exchange
Solution
Root hairs increase the surface area of roots, enhancing the plant's ability to absorb water and nutrients from the soil.
Correct Answer:
B
— Water absorption
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Q. What is the main purpose of the G1 checkpoint?
-
A.
To check DNA integrity
-
B.
To ensure proper chromosome alignment
-
C.
To assess cell size and nutrient availability
-
D.
To initiate DNA replication
Solution
The G1 checkpoint assesses cell size and nutrient availability before allowing the cell to proceed to DNA synthesis.
Correct Answer:
C
— To assess cell size and nutrient availability
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Q. What is the main role of the stem in a plant?
-
A.
Storage of nutrients
-
B.
Transport of nutrients and water
-
C.
Photosynthesis
-
D.
Reproduction
Solution
The stem primarily functions to transport nutrients and water between roots and leaves.
Correct Answer:
B
— Transport of nutrients and water
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Q. What is the mechanism of action of fluoroquinolones?
-
A.
Inhibition of cell wall synthesis
-
B.
Inhibition of protein synthesis
-
C.
Inhibition of DNA gyrase
-
D.
Inhibition of folic acid synthesis
Solution
Fluoroquinolones inhibit DNA gyrase, which is essential for bacterial DNA replication.
Correct Answer:
C
— Inhibition of DNA gyrase
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Q. What is the primary active component in vinegar that contributes to its acidity?
-
A.
Acetic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Vinegar primarily contains acetic acid, which gives it its characteristic sour taste and acidity.
Correct Answer:
A
— Acetic acid
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Q. What is the primary advantage of using biosensors in clinical diagnostics?
-
A.
High specificity and sensitivity
-
B.
Low cost of production
-
C.
Ease of use
-
D.
Long shelf life
Solution
Biosensors offer high specificity and sensitivity, making them valuable tools for accurate clinical diagnostics.
Correct Answer:
A
— High specificity and sensitivity
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Q. What is the primary benefit of synthetic seeds in agriculture?
-
A.
Increased genetic diversity
-
B.
Uniformity in plant characteristics
-
C.
Higher nutritional value
-
D.
Faster growth rates
Solution
Synthetic seeds provide uniformity in plant characteristics, which is beneficial for commercial agriculture.
Correct Answer:
B
— Uniformity in plant characteristics
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Q. What is the primary characteristic of schizophrenia?
-
A.
Mood swings
-
B.
Hallucinations
-
C.
Memory loss
-
D.
Obsessive thoughts
Solution
Schizophrenia is primarily characterized by hallucinations, which can include hearing voices or seeing things that are not present.
Correct Answer:
B
— Hallucinations
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Q. What is the primary driving force for the movement of nutrients in phloem?
-
A.
Root pressure
-
B.
Transpiration pull
-
C.
Pressure flow mechanism
-
D.
Capillary action
Solution
The pressure flow mechanism explains how sugars are actively transported into the phloem, creating a pressure gradient that drives flow.
Correct Answer:
C
— Pressure flow mechanism
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Q. What is the primary ethical concern associated with recombinant DNA technology?
-
A.
Cost of research
-
B.
Potential for creating harmful organisms
-
C.
Difficulty in obtaining funding
-
D.
Lack of scientific interest
Solution
The primary ethical concern is the potential for creating harmful organisms that could impact ecosystems or human health.
Correct Answer:
B
— Potential for creating harmful organisms
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Q. What is the primary event during the S phase?
-
A.
Cell growth
-
B.
Chromosome segregation
-
C.
DNA synthesis
-
D.
Cytokinesis
Solution
The primary event during the S phase is DNA synthesis, where the cell replicates its genetic material.
Correct Answer:
C
— DNA synthesis
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Q. What is the primary feature of post-traumatic stress disorder (PTSD)?
-
A.
Compulsive behaviors
-
B.
Flashbacks
-
C.
Social withdrawal
-
D.
Mood swings
Solution
The primary feature of PTSD is the experience of flashbacks or intrusive memories related to a traumatic event.
Correct Answer:
B
— Flashbacks
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