Q. What is the primary role of gibberellins in seed germination? (2023)
A.
Inhibit growth
B.
Promote enzyme production
C.
Stimulate root growth
D.
Enhance photosynthesis
Show solution
Solution
Gibberellins promote enzyme production that breaks down stored food in seeds, facilitating germination.
Correct Answer:
B
— Promote enzyme production
Learn More →
Q. What is the primary role of potassium in plants? (2020)
A.
Photosynthesis
B.
Water regulation
C.
Protein synthesis
D.
Cell division
Show solution
Solution
Potassium plays a crucial role in water regulation and osmotic balance in plants, helping to maintain turgor pressure.
Correct Answer:
B
— Water regulation
Learn More →
Q. What is the primary role of root hairs in plants?
A.
Photosynthesis
B.
Water absorption
C.
Nutrient storage
D.
Gas exchange
Show solution
Solution
Root hairs increase the surface area for water absorption from the soil.
Correct Answer:
B
— Water absorption
Learn More →
Q. What is the primary role of synovial fluid in joints? (2023)
A.
To provide nutrients
B.
To lubricate the joint
C.
To absorb shock
D.
To connect bones
Show solution
Solution
Synovial fluid lubricates the joint, reducing friction and allowing for smooth movement.
Correct Answer:
B
— To lubricate the joint
Learn More →
Q. What is the primary role of the cytoskeleton? (2022)
A.
Energy production
B.
Cell shape and movement
C.
Protein synthesis
D.
DNA replication
Show solution
Solution
The cytoskeleton provides structural support, helps maintain cell shape, and facilitates cell movement.
Correct Answer:
B
— Cell shape and movement
Learn More →
Q. What is the primary role of the sepal in a flower? (2023)
A.
Attract pollinators
B.
Protect the flower bud
C.
Support the flower
D.
Produce pollen
Show solution
Solution
Sepals protect the flower bud before it opens and can also support the flower.
Correct Answer:
B
— Protect the flower bud
Learn More →
Q. What is the primary role of the spinal cord in the nervous system? (2022)
A.
To process sensory information
B.
To coordinate voluntary movements
C.
To transmit signals between the brain and the body
D.
To store memories
Show solution
Solution
The spinal cord transmits signals between the brain and the rest of the body, playing a crucial role in reflex actions.
Correct Answer:
C
— To transmit signals between the brain and the body
Learn More →
Q. What is the primary role of the tendons in the muscular system? (2020)
A.
Connect muscles to bones
B.
Store energy
C.
Facilitate blood flow
D.
Protect muscles
Show solution
Solution
Tendons connect muscles to bones, allowing for movement when muscles contract.
Correct Answer:
A
— Connect muscles to bones
Learn More →
Q. What is the primary role of the xylem in flowering plants? (2023)
A.
Transport of food
B.
Transport of water
C.
Storage of nutrients
D.
Photosynthesis
Show solution
Solution
Xylem is responsible for the transport of water and minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transport of water
Learn More →
Q. What is the primary role of white blood cells? (2022)
A.
Transporting oxygen
B.
Clotting blood
C.
Fighting infections
D.
Transporting nutrients
Show solution
Solution
White blood cells are crucial for the immune response, helping to defend the body against infections and foreign invaders.
Correct Answer:
C
— Fighting infections
Learn More →
Q. What is the primary site of nutrient absorption in the digestive system? (2023)
A.
Mouth
B.
Stomach
C.
Small intestine
D.
Large intestine
Show solution
Solution
The small intestine is the primary site for the absorption of nutrients from digested food.
Correct Answer:
C
— Small intestine
Learn More →
Q. What is the primary site of nutrient absorption in the human body? (2020)
A.
Stomach
B.
Large intestine
C.
Small intestine
D.
Esophagus
Show solution
Solution
The small intestine is the primary site for the absorption of nutrients due to its large surface area.
Correct Answer:
C
— Small intestine
Learn More →
Q. What is the primary site of protein digestion? (2023)
A.
Mouth
B.
Stomach
C.
Small intestine
D.
Large intestine
Show solution
Solution
The stomach is the primary site of protein digestion, where pepsin begins the breakdown of proteins.
Correct Answer:
B
— Stomach
Learn More →
Q. What is the primary site of respiration in plant cells? (2021)
A.
Chloroplast
B.
Mitochondria
C.
Cytoplasm
D.
Nucleus
Show solution
Solution
The primary site of respiration in plant cells is the mitochondria, where ATP is produced through cellular respiration.
Correct Answer:
B
— Mitochondria
Learn More →
Q. What is the primary source of energy for an ecosystem? (2020)
A.
Wind
B.
Water
C.
Sunlight
D.
Soil
Show solution
Solution
Sunlight is the primary source of energy for most ecosystems, as it drives photosynthesis in plants.
Correct Answer:
C
— Sunlight
Learn More →
Q. What is the primary source of energy for most ecosystems? (2020)
A.
Geothermal energy
B.
Wind energy
C.
Solar energy
D.
Nuclear energy
Show solution
Solution
Solar energy is the primary source of energy for most ecosystems, driving photosynthesis in plants.
Correct Answer:
C
— Solar energy
Learn More →
Q. What is the primary source of energy for photosynthesis? (2023)
A.
Chemical energy
B.
Solar energy
C.
Thermal energy
D.
Mechanical energy
Show solution
Solution
Solar energy is the primary source of energy for photosynthesis, driving the process.
Correct Answer:
B
— Solar energy
Learn More →
Q. What is the primary source of energy for the Earth? (2022)
A.
Geothermal energy
B.
Solar energy
C.
Nuclear energy
D.
Wind energy
Show solution
Solution
The primary source of energy for the Earth is solar energy, which drives weather, climate, and photosynthesis.
Correct Answer:
B
— Solar energy
Learn More →
Q. What is the primary source of genetic variation in a population? (2022)
A.
Mutation
B.
Natural Selection
C.
Gene Flow
D.
Genetic Drift
Show solution
Solution
Mutation is the primary source of genetic variation in a population, as it introduces new alleles into the gene pool, which can then be acted upon by natural selection.
Correct Answer:
A
— Mutation
Learn More →
Q. What is the primary source of genetic variation in populations? (2023)
A.
Mutation
B.
Natural Selection
C.
Gene Flow
D.
Genetic Drift
Show solution
Solution
Mutations are the primary source of genetic variation, providing the raw material for evolution.
Correct Answer:
A
— Mutation
Learn More →
Q. What is the primary source of sulfur dioxide in the atmosphere? (2020)
A.
Volcanic eruptions
B.
Automobile emissions
C.
Industrial processes
D.
Natural gas combustion
Show solution
Solution
Industrial processes, especially those involving the burning of fossil fuels, are the primary source of sulfur dioxide emissions.
Correct Answer:
C
— Industrial processes
Learn More →
Q. What is the primary source of water pollution? (2023)
A.
Industrial discharge
B.
Agricultural runoff
C.
Sewage disposal
D.
All of the above
Show solution
Solution
All of the listed options contribute significantly to water pollution, affecting aquatic life and human health.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the primary type of bonding in metallic solids? (2020)
A.
Ionic bonding
B.
Covalent bonding
C.
Metallic bonding
D.
Hydrogen bonding
Show solution
Solution
Metallic solids are primarily held together by metallic bonding, which involves a 'sea of electrons' that are free to move.
Correct Answer:
C
— Metallic bonding
Learn More →
Q. What is the primary use of bioremediation? (2023)
A.
To produce biofuels
B.
To clean up environmental pollutants
C.
To enhance soil fertility
D.
To increase crop yield
Show solution
Solution
Bioremediation is primarily used to clean up environmental pollutants using microorganisms.
Correct Answer:
B
— To clean up environmental pollutants
Learn More →
Q. What is the primary use of boron in industry? (2019) 2019
A.
Fertilizers
B.
Glass production
C.
Metallurgy
D.
Pharmaceuticals
Show solution
Solution
Boron is primarily used in the production of glass and ceramics.
Correct Answer:
B
— Glass production
Learn More →
Q. What is the primary use of boron in the industry? (2023)
A.
Fertilizers
B.
Glass production
C.
Detergents
D.
Pharmaceuticals
Show solution
Solution
Boron is primarily used in the production of glass and ceramics.
Correct Answer:
B
— Glass production
Learn More →
Q. What is the primary use of calcium carbonate? (2019)
A.
As a fertilizer
B.
In the production of glass
C.
As a building material
D.
In antacids
Show solution
Solution
Calcium carbonate is commonly used in antacids to neutralize stomach acid.
Correct Answer:
D
— In antacids
Learn More →
Q. What is the primary use of CRISPR technology in biotechnology? (2023)
A.
Gene editing
B.
Protein synthesis
C.
Cell culture
D.
DNA replication
Show solution
Solution
CRISPR technology is primarily used for gene editing, allowing precise modifications to DNA sequences.
Correct Answer:
A
— Gene editing
Learn More →
Q. What is the primary use of glycerol in the food industry? (2023)
A.
Sweetener
B.
Preservative
C.
Thickening agent
D.
Flavor enhancer
Show solution
Solution
Glycerol is commonly used as a sweetener in food products due to its sweet taste and ability to retain moisture.
Correct Answer:
A
— Sweetener
Learn More →
Q. What is the primary use of insulin produced through recombinant DNA technology? (2022)
A.
To treat diabetes
B.
To enhance growth in livestock
C.
To improve crop yield
D.
To produce biofuels
Show solution
Solution
Insulin produced through recombinant DNA technology is primarily used to treat diabetes by regulating blood sugar levels.
Correct Answer:
A
— To treat diabetes
Learn More →
Showing 3361 to 3390 of 5509 (184 Pages)