Q. What is the primary application of recombinant DNA technology in medicine? (2020)
A.
Production of insulin
B.
Gene therapy
C.
Vaccines
D.
All of the above
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Solution
Recombinant DNA technology is used in various medical applications including the production of insulin, gene therapy, and vaccines.
Correct Answer: D — All of the above
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Q. What is the primary argument made by the author regarding economic inequalities?
A.
They are the most significant type of inequality.
B.
They can be addressed through education.
C.
They are often ignored in policy discussions.
D.
They are a result of individual choices.
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Solution
The author emphasizes that economic inequalities are a critical issue that deserves attention in policy discussions.
Correct Answer: A — They are the most significant type of inequality.
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Q. What is the primary argument presented in the passage regarding climate change?
A.
Climate change is a natural phenomenon.
B.
Human activities are the main cause of climate change.
C.
Climate change has no significant impact on biodiversity.
D.
The effects of climate change are reversible.
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Solution
The passage emphasizes that human activities, particularly the burning of fossil fuels, are the primary drivers of climate change.
Correct Answer: B — Human activities are the main cause of climate change.
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Q. What is the primary assumption of the kinetic theory of gases regarding the motion of gas molecules?
A.
Gas molecules are stationary.
B.
Gas molecules move in straight lines until they collide.
C.
Gas molecules are always in a state of vibration.
D.
Gas molecules have a fixed volume.
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Solution
The kinetic theory assumes that gas molecules move in straight lines until they collide with each other or the walls of the container.
Correct Answer: B — Gas molecules move in straight lines until they collide.
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Q. What is the primary basis for the classification of living organisms? (2020)
A.
Habitat
B.
Morphology
C.
Genetic similarity
D.
Size
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Solution
Genetic similarity is the primary basis for the classification of living organisms.
Correct Answer: C — Genetic similarity
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Q. What is the primary benefit of using probiotics? (2023)
A.
To cure diseases
B.
To enhance gut health
C.
To increase appetite
D.
To reduce weight
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Solution
Probiotics are beneficial bacteria that help enhance gut health and improve digestion.
Correct Answer: B — To enhance gut health
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Q. What is the primary bond type in polymers?
A.
Ionic bonds
B.
Covalent bonds
C.
Metallic bonds
D.
Hydrogen bonds
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Solution
Covalent bonds are the primary bond type in polymers, linking monomers together.
Correct Answer: B — Covalent bonds
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Q. What is the primary cause of a zero error? (2019)
A.
Instrument wear and tear
B.
Incorrect calibration
C.
Environmental factors
D.
User error
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Solution
A zero error occurs when an instrument does not read zero when it should, often due to incorrect calibration.
Correct Answer: B — Incorrect calibration
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Q. What is the primary cause of AIDS? (2020)
A.
Bacteria
B.
Virus
C.
Fungi
D.
Protozoa
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Solution
AIDS is caused by the Human Immunodeficiency Virus (HIV), which is a virus.
Correct Answer: B — Virus
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Q. What is the primary cause of biodiversity loss worldwide? (2020)
A.
Climate change
B.
Habitat destruction
C.
Pollution
D.
Overexploitation
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Solution
Habitat destruction is the primary cause of biodiversity loss, as it leads to the loss of species and ecosystems.
Correct Answer: B — Habitat destruction
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Q. What is the primary cause of buoyancy in fluids?
A.
Surface tension
B.
Pressure difference
C.
Viscosity
D.
Density
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Solution
Buoyancy is primarily caused by the pressure difference between the top and bottom of an object submerged in a fluid.
Correct Answer: B — Pressure difference
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Q. What is the primary cause of capillary action in liquids?
A.
Cohesion
B.
Adhesion
C.
Viscosity
D.
Density
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Solution
Capillary action is primarily caused by adhesion, where the liquid molecules are attracted to the surface of the solid.
Correct Answer: B — Adhesion
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Q. What is the primary cause of global warming?
A.
Deforestation
B.
Greenhouse gas emissions
C.
Ozone depletion
D.
Acid rain
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Solution
Greenhouse gas emissions, particularly CO2, are the primary cause of global warming.
Correct Answer: B — Greenhouse gas emissions
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Q. What is the primary cause of ocean acidification?
A.
Plastic pollution
B.
Increased CO2 absorption
C.
Heavy metal contamination
D.
Thermal pollution
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Solution
Ocean acidification is primarily caused by the increased absorption of CO2 from the atmosphere into ocean waters.
Correct Answer: B — Increased CO2 absorption
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Q. What is the primary cause of ocean currents?
A.
Wind patterns
B.
Earth's rotation
C.
Temperature differences
D.
Salinity differences
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Solution
The primary cause of ocean currents is wind patterns, which drive the movement of water across the surface.
Correct Answer: A — Wind patterns
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Q. What is the primary cause of surface tension in liquids?
A.
Cohesive forces
B.
Adhesive forces
C.
Gravitational forces
D.
Electromagnetic forces
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Solution
Surface tension is primarily caused by cohesive forces between liquid molecules, which create a 'skin' at the surface.
Correct Answer: A — Cohesive forces
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Q. What is the primary cause of the greenhouse effect?
A.
Ozone depletion
B.
Increased solar radiation
C.
Trapping of heat by greenhouse gases
D.
Deforestation
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Solution
The greenhouse effect is primarily caused by the trapping of heat in the Earth's atmosphere by greenhouse gases.
Correct Answer: C — Trapping of heat by greenhouse gases
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Q. What is the primary cause of the phenomenon known as capillarity?
A.
Cohesion
B.
Adhesion
C.
Viscosity
D.
Density
Show solution
Solution
Capillarity is primarily caused by adhesion, which is the attraction between the liquid molecules and the surface of the solid.
Correct Answer: B — Adhesion
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Q. What is the primary cause of the phenomenon of buoyancy?
A.
Surface tension
B.
Pressure difference
C.
Viscosity
D.
Density
Show solution
Solution
Buoyancy is caused by the pressure difference between the top and bottom of an object submerged in a fluid.
Correct Answer: B — Pressure difference
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Q. What is the primary cause of the phenomenon of capillarity?
A.
Cohesion
B.
Adhesion
C.
Viscosity
D.
Density
Show solution
Solution
Capillarity is primarily caused by adhesion, which is the attraction between the liquid molecules and the surface of the solid.
Correct Answer: B — Adhesion
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Q. What is the primary cause of tides on Earth? (2019)
A.
Wind
B.
Earth's rotation
C.
Gravitational pull of the moon
D.
Ocean currents
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Solution
The primary cause of tides on Earth is the gravitational pull of the moon.
Correct Answer: C — Gravitational pull of the moon
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Q. What is the primary cause of tuberculosis? (2020)
A.
Bacteria
B.
Virus
C.
Fungi
D.
Protozoa
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Solution
Tuberculosis is primarily caused by the bacterium Mycobacterium tuberculosis.
Correct Answer: A — Bacteria
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Q. What is the primary cause of viscosity in fluids?
A.
Molecular interactions
B.
Temperature
C.
Pressure
D.
Density
Show solution
Solution
Viscosity arises primarily from molecular interactions within the fluid, which resist flow.
Correct Answer: A — Molecular interactions
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Q. What is the primary characteristic of a K-selected species? (2023)
A.
High reproductive rate
B.
Short lifespan
C.
High parental care
D.
Rapid growth
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Solution
K-selected species typically exhibit high parental care and invest more resources in fewer offspring.
Correct Answer: C — High parental care
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Q. What is the primary characteristic of a redox reaction? (2023)
A.
Transfer of protons
B.
Transfer of electrons
C.
Change in temperature
D.
Change in pressure
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Solution
The primary characteristic of a redox reaction is the transfer of electrons between species.
Correct Answer: B — Transfer of electrons
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Q. What is the primary characteristic of adsorption? (2023)
A.
It is a bulk phenomenon.
B.
It involves a chemical reaction.
C.
It is a surface phenomenon.
D.
It requires high temperature.
Show solution
Solution
Adsorption is a surface phenomenon where molecules adhere to the surface of a solid or liquid.
Correct Answer: C — It is a surface phenomenon.
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Q. What is the primary characteristic of alkaline earth metals? (2020)
A.
They are highly reactive
B.
They have a +2 oxidation state
C.
They are gases at room temperature
D.
They form covalent bonds
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Solution
Alkaline earth metals typically have a +2 oxidation state due to the loss of two electrons.
Correct Answer: B — They have a +2 oxidation state
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Q. What is the primary characteristic of amorphous solids? (2023)
A.
Long-range order
B.
Short-range order
C.
Definite melting point
D.
High thermal conductivity
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Solution
Amorphous solids have short-range order but lack long-range order, unlike crystalline solids.
Correct Answer: B — Short-range order
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Q. What is the primary characteristic of Baroque art that emerged in the 17th century?
A.
Emphasis on emotion and movement
B.
Use of geometric shapes
C.
Focus on minimalism
D.
Incorporation of abstract forms
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Solution
Baroque art is characterized by its dramatic use of light and shadow, emotional intensity, and a sense of movement, reflecting the complexities of the human experience.
Correct Answer: A — Emphasis on emotion and movement
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Q. What is the primary characteristic of gases compared to solids and liquids? (2023)
A.
Definite shape
B.
Definite volume
C.
High compressibility
D.
Low density
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Solution
Gases have high compressibility due to the large spaces between particles, unlike solids and liquids which have definite shape and volume.
Correct Answer: C — High compressibility
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