Q. What is the primary function of the mitochondria? (2020)
A.
Photosynthesis
B.
Cellular respiration
C.
Protein synthesis
D.
DNA replication
Show solution
Solution
Mitochondria are known as the powerhouse of the cell, where cellular respiration occurs to produce ATP.
Correct Answer:
B
— Cellular respiration
Learn More →
Q. What is the primary function of the respiratory system in the human body? (2021)
A.
To circulate blood
B.
To exchange gases
C.
To digest food
D.
To regulate temperature
Show solution
Solution
The primary function of the respiratory system is to exchange gases, specifically to take in oxygen and expel carbon dioxide.
Correct Answer:
B
— To exchange gases
Learn More →
Q. What is the primary function of the ribosomes in a cell? (2021)
A.
Energy production
B.
Protein synthesis
C.
DNA replication
D.
Cell division
Show solution
Solution
Ribosomes are the cellular structures responsible for synthesizing proteins by translating messenger RNA (mRNA).
Correct Answer:
B
— Protein synthesis
Learn More →
Q. What is the primary gas responsible for the greenhouse effect? (2023)
A.
Oxygen
B.
Nitrogen
C.
Carbon Dioxide
D.
Hydrogen
Show solution
Solution
Carbon Dioxide is the primary gas responsible for the greenhouse effect.
Correct Answer:
C
— Carbon Dioxide
Learn More →
Q. What is the primary method used to study the Earth's interior? (2023)
A.
Seismic waves
B.
Magnetic field analysis
C.
Gravitational studies
D.
Satellite imagery
Show solution
Solution
Seismic waves generated by earthquakes are the primary method used to study the Earth's interior structure.
Correct Answer:
A
— Seismic waves
Learn More →
Q. What is the primary objective of the Pradhan Mantri Awas Yojana (PMAY)? (2022)
A.
To provide free education to all children
B.
To ensure housing for all by 2022
C.
To promote digital literacy
D.
To enhance agricultural productivity
Show solution
Solution
The Pradhan Mantri Awas Yojana aims to provide affordable housing to the urban poor and ensure housing for all by the year 2022.
Correct Answer:
B
— To ensure housing for all by 2022
Learn More →
Q. What is the primary product of the complete combustion of propane (C3H8)? (2020)
A.
Carbon monoxide
B.
Water
C.
Carbon dioxide
D.
Hydrogen
Show solution
Solution
The complete combustion of propane produces carbon dioxide (CO2) and water (H2O) as primary products.
Correct Answer:
C
— Carbon dioxide
Learn More →
Q. What is the primary product when an acid reacts with a metal carbonate?
A.
Salt
B.
Water
C.
Carbon dioxide
D.
All of the above
Show solution
Solution
The reaction produces a salt, water, and carbon dioxide.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the primary product when sodium bicarbonate reacts with hydrochloric acid?
A.
Sodium chloride
B.
Carbon dioxide
C.
Water
D.
All of the above
Show solution
Solution
The reaction produces sodium chloride, carbon dioxide, and water.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the primary reason for the Earth's magnetic field? (2020)
A.
Movement of the crust
B.
Flow of molten iron in the outer core
C.
Solar winds
D.
Tectonic activity
Show solution
Solution
The Earth's magnetic field is primarily generated by the flow of molten iron in the outer core.
Correct Answer:
B
— Flow of molten iron in the outer core
Learn More →
Q. What is the primary reason for the movement of tectonic plates?
A.
Gravity
B.
Convection currents
C.
Magnetic forces
D.
Centrifugal force
Show solution
Solution
Tectonic plates move primarily due to convection currents in the mantle, which are caused by the heat from the Earth's core.
Correct Answer:
B
— Convection currents
Learn More →
Q. What is the primary reason for the occurrence of seasons on Earth? (2022)
A.
Distance from the Sun
B.
Tilt of the Earth's axis
C.
Revolution around the Sun
D.
Rotation of the Earth
Show solution
Solution
The primary reason for the occurrence of seasons on Earth is the tilt of the Earth's axis.
Correct Answer:
B
— Tilt of the Earth's axis
Learn More →
Q. What is the primary reason that gases fill their containers? (2023)
A.
High density
B.
Low density
C.
High kinetic energy
D.
Low kinetic energy
Show solution
Solution
Gases fill their containers due to high kinetic energy, which allows particles to move freely and spread out.
Correct Answer:
C
— High kinetic energy
Learn More →
Q. What is the primary role of chloroplasts in plant cells?
A.
Energy production
B.
Photosynthesis
C.
Cell division
D.
Respiration
Show solution
Solution
Chloroplasts are the organelles in plant cells where photosynthesis occurs, converting light energy into chemical energy.
Correct Answer:
B
— Photosynthesis
Learn More →
Q. What is the primary role of red blood cells?
A.
To fight infections
B.
To transport oxygen
C.
To clot blood
D.
To produce hormones
Show solution
Solution
Red blood cells are primarily responsible for transporting oxygen from the lungs to the body's tissues.
Correct Answer:
B
— To transport oxygen
Learn More →
Q. What is the primary role of xylem in plants? (2022)
A.
Transport of nutrients
B.
Transport of water
C.
Photosynthesis
D.
Storage of food
Show solution
Solution
Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transport of water
Learn More →
Q. What is the primary source of energy for the Earth's climate system?
A.
The Moon
B.
The Sun
C.
Geothermal energy
D.
Nuclear energy
Show solution
Solution
The primary source of energy for the Earth's climate system is the Sun.
Correct Answer:
B
— The Sun
Learn More →
Q. What is the primary source of energy in a balanced diet?
A.
Proteins
B.
Carbohydrates
C.
Fats
D.
Vitamins
Show solution
Solution
Carbohydrates are the primary source of energy in a balanced diet, providing 4 calories per gram.
Correct Answer:
B
— Carbohydrates
Learn More →
Q. What is the primary state of matter in the Earth's outer core? (2019)
A.
Solid
B.
Liquid
C.
Gas
D.
Plasma
Show solution
Solution
The outer core is in a liquid state, composed mainly of molten iron and nickel.
Correct Answer:
B
— Liquid
Learn More →
Q. What is the primary state of matter that has a definite shape and volume?
A.
Gas
B.
Liquid
C.
Solid
D.
Plasma
Show solution
Solution
Solids have a definite shape and volume due to closely packed particles.
Correct Answer:
C
— Solid
Learn More →
Q. What is the primary use of aluminum in construction?
A.
Electrical wiring
B.
Structural components
C.
Piping
D.
Insulation
Show solution
Solution
Aluminum is widely used in structural components due to its strength-to-weight ratio.
Correct Answer:
B
— Structural components
Learn More →
Q. What is the probability of a person being diagnosed with a disease if the prevalence of the disease in a population is 2% and the test for the disease has a sensitivity of 90% and a specificity of 95%? (2021)
A.
0.018
B.
0.020
C.
0.090
D.
0.095
Show solution
Solution
Using Bayes' theorem, P(Disease|Positive) = (P(Positive|Disease) * P(Disease)) / P(Positive). Here, P(Positive) = P(Positive|Disease) * P(Disease) + P(Positive|No Disease) * P(No Disease). Calculating gives approximately 0.018.
Correct Answer:
A
— 0.018
Learn More →
Q. What is the probability of a person being infected with a disease if the prevalence of the disease in a population is 2%? (2021)
A.
0.02
B.
0.5
C.
0.1
D.
0.03
Show solution
Solution
The prevalence of the disease is given as 2%, which can be expressed as a probability of 0.02.
Correct Answer:
A
— 0.02
Learn More →
Q. What is the probability of rolling a sum of 7 with two six-sided dice? (2022)
A.
1/6
B.
1/12
C.
1/36
D.
5/36
Show solution
Solution
The combinations to get a sum of 7 are (1,6), (2,5), (3,4), (4,3), (5,2), (6,1) = 6 ways. Total outcomes = 36. Probability = 6/36 = 1/6.
Correct Answer:
D
— 5/36
Learn More →
Q. What is the process by which plants lose water vapor called? (2019)
A.
Transpiration
B.
Evaporation
C.
Condensation
D.
Photosynthesis
Show solution
Solution
Transpiration is the process where water vapor is lost from the plant, primarily through stomata in the leaves.
Correct Answer:
A
— Transpiration
Learn More →
Q. What is the process by which plants lose water vapor through small openings in their leaves called? (2019)
A.
Transpiration
B.
Evaporation
C.
Condensation
D.
Photosynthesis
Show solution
Solution
Transpiration is the process of water vapor loss from plant leaves, which helps in nutrient transport and temperature regulation.
Correct Answer:
A
— Transpiration
Learn More →
Q. What is the process by which plants lose water vapor to the atmosphere?
A.
Transpiration
B.
Evaporation
C.
Condensation
D.
Precipitation
Show solution
Solution
Transpiration is the process through which water vapor is lost from the plant to the atmosphere, primarily through stomata.
Correct Answer:
A
— Transpiration
Learn More →
Q. What is the product of the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)? (2022)
A.
Sodium chloride and water
B.
Sodium chloride and hydrogen
C.
Hydrogen and oxygen
D.
Sodium and water
Show solution
Solution
The reaction between HCl and NaOH produces sodium chloride (NaCl) and water (H2O).
Correct Answer:
A
— Sodium chloride and water
Learn More →
Q. What is the product of the reaction between hydrochloric acid and sodium bicarbonate? (2022)
A.
Sodium chloride
B.
Carbon dioxide
C.
Water
D.
All of the above
Show solution
Solution
The reaction produces sodium chloride, carbon dioxide, and water: HCl + NaHCO3 → NaCl + CO2 + H2O.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the product of the reaction between sodium (Na) and chlorine (Cl2)? (2019)
A.
NaCl
B.
NaCl2
C.
Na2Cl
D.
Na2Cl2
Show solution
Solution
Sodium reacts with chlorine to form sodium chloride (NaCl).
Correct Answer:
A
— NaCl
Learn More →
Showing 1411 to 1440 of 1958 (66 Pages)