Q. Which of the following is NOT a benefit of using biotechnology in agriculture? (2022)
A.
Reduced pesticide use
B.
Increased resistance to diseases
C.
Higher production costs
D.
Enhanced nutritional content
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Solution
Higher production costs are not a benefit of biotechnology; in fact, biotechnology aims to reduce costs.
Correct Answer:
C
— Higher production costs
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Q. Which of the following is NOT a biotechnological application in medicine? (2022)
A.
Gene therapy
B.
Monoclonal antibodies
C.
Genetic engineering of crops
D.
Vaccines production
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Solution
Genetic engineering of crops is primarily an agricultural application, not a direct medical application.
Correct Answer:
C
— Genetic engineering of crops
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Q. Which of the following is NOT a biotechnological application? (2022)
A.
Bioremediation
B.
Gene therapy
C.
Traditional farming
D.
Production of biofuels
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Solution
Traditional farming does not involve biotechnological methods, while the other options are applications of biotechnology.
Correct Answer:
C
— Traditional farming
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Q. Which of the following is NOT a characteristic of a population? (2023)
A.
Density
B.
Birth rate
C.
Age structure
D.
Species diversity
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Solution
Species diversity refers to the variety of species in an ecosystem, not a characteristic of a single population.
Correct Answer:
D
— Species diversity
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Q. Which of the following is NOT a characteristic of an ecosystem? (2021)
A.
Energy flow
B.
Nutrient cycling
C.
Static population
D.
Biotic and abiotic interactions
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Solution
Ecosystems are dynamic and characterized by changing populations, not static populations.
Correct Answer:
C
— Static population
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Q. Which of the following is not a characteristic of an endothermic reaction? (2023)
A.
Absorbs heat
B.
Feels cold to the touch
C.
Releases heat
D.
Positive ΔH
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Solution
Endothermic reactions absorb heat, feel cold, and have a positive ΔH; they do not release heat.
Correct Answer:
C
— Releases heat
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Q. Which of the following is NOT a characteristic of an exothermic reaction? (2019)
A.
Releases heat
B.
ΔH is negative
C.
Temperature of the surroundings increases
D.
Absorbs energy from the surroundings
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Solution
An exothermic reaction releases heat and has a negative ΔH. It causes the temperature of the surroundings to increase, not absorb energy.
Correct Answer:
D
— Absorbs energy from the surroundings
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Q. Which of the following is not a characteristic of an ideal solution? (2019)
A.
Constant boiling point
B.
Obeys Raoult's law
C.
No heat change on mixing
D.
Variable composition
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Solution
An ideal solution has a constant boiling point and obeys Raoult's law, while variable composition is not a characteristic.
Correct Answer:
D
— Variable composition
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Q. Which of the following is NOT a characteristic of crystalline solids? (2019)
A.
Anisotropy
B.
Definite melting point
C.
Isotropy
D.
Long-range order
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Solution
Crystalline solids exhibit anisotropy, meaning their properties vary with direction, while isotropy refers to uniform properties in all directions.
Correct Answer:
C
— Isotropy
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Q. Which of the following is not a characteristic of d-block elements? (2023)
A.
Formation of complex ions
B.
Variable oxidation states
C.
High ionization energies
D.
Good conductors of electricity
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Solution
D-block elements typically have variable oxidation states and lower ionization energies compared to p-block elements.
Correct Answer:
C
— High ionization energies
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Q. Which of the following is NOT a characteristic of essential oils? (2021)
A.
Volatile
B.
Non-polar
C.
Water-soluble
D.
Aromatic
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Solution
Essential oils are typically non-water-soluble and are known for their volatile and aromatic properties.
Correct Answer:
C
— Water-soluble
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Q. Which of the following is NOT a characteristic of ionic solids? (2021)
A.
High melting point
B.
Electrical conductivity in solid state
C.
Brittleness
D.
Solubility in water
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Solution
Ionic solids do not conduct electricity in the solid state; they conduct when melted or dissolved in water.
Correct Answer:
B
— Electrical conductivity in solid state
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Q. Which of the following is NOT a characteristic of K-selected species? (2022)
A.
Long lifespan
B.
High parental care
C.
High reproductive rate
D.
Stable population size
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Solution
K-selected species typically have low reproductive rates, focusing on raising fewer offspring with high parental care.
Correct Answer:
C
— High reproductive rate
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Q. Which of the following is not a characteristic of life? (2023)
A.
Metabolism
B.
Homeostasis
C.
Adaptation
D.
Decay
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Solution
Decay is not a characteristic of life; it is a process that occurs after death.
Correct Answer:
D
— Decay
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Q. Which of the following is NOT a characteristic of living organisms? (2020)
A.
Growth
B.
Reproduction
C.
Movement
D.
Inertia
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Solution
Inertia is not a characteristic of living organisms; they exhibit growth, reproduction, and movement.
Correct Answer:
D
— Inertia
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Q. Which of the following is not a characteristic of p-block elements? (2021)
A.
Form covalent bonds
B.
Have high electronegativity
C.
Are all metals
D.
Can form multiple oxidation states
Show solution
Solution
Not all p-block elements are metals; many are nonmetals and metalloids.
Correct Answer:
C
— Are all metals
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Q. Which of the following is NOT a characteristic of polymers? (2023)
A.
High molecular weight
B.
Low melting point
C.
Viscoelasticity
D.
Solubility in water
Show solution
Solution
Polymers typically have low solubility in water, especially synthetic ones.
Correct Answer:
D
— Solubility in water
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Q. Which of the following is NOT a characteristic of r-selected species? (2019)
A.
High fecundity
B.
Short lifespan
C.
Low parental investment
D.
Long gestation period
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Solution
R-selected species are characterized by high fecundity and short lifespans, not long gestation periods.
Correct Answer:
D
— Long gestation period
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Q. Which of the following is NOT a characteristic of solids? (2023)
A.
Definite shape
B.
Definite volume
C.
High compressibility
D.
Low kinetic energy
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Solution
Solids are not highly compressible; they have a definite shape and volume, and their particles vibrate in fixed positions.
Correct Answer:
C
— High compressibility
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Q. Which of the following is NOT a characteristic of the phylum Echinodermata? (2022)
A.
Radial symmetry
B.
Water vascular system
C.
Presence of a notochord
D.
Tube feet
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Solution
Echinodermata do not possess a notochord; this feature is characteristic of Chordata.
Correct Answer:
C
— Presence of a notochord
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Q. Which of the following is NOT a characteristic of the phylum Mollusca? (2022)
A.
Soft-bodied
B.
Presence of a shell
C.
Jointed legs
D.
Mantle
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Solution
Phylum Mollusca is characterized by soft bodies, often with a shell, and a mantle, but they do not have jointed legs.
Correct Answer:
C
— Jointed legs
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Q. Which of the following is NOT a characteristic of the phylum Porifera? (2023)
A.
Multicellular
B.
Presence of true tissues
C.
Aquatic habitat
D.
Filter feeders
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Solution
Porifera, or sponges, lack true tissues, which distinguishes them from other multicellular organisms.
Correct Answer:
B
— Presence of true tissues
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Q. Which of the following is not a characteristic of the plant kingdom? (2020)
A.
Eukaryotic cells
B.
Autotrophic nutrition
C.
Presence of chlorophyll
D.
Heterotrophic nutrition
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Solution
The plant kingdom is characterized by eukaryotic cells, autotrophic nutrition, and the presence of chlorophyll. Heterotrophic nutrition is not a characteristic of plants.
Correct Answer:
D
— Heterotrophic nutrition
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Q. Which of the following is not a component of DNA? (2018)
A.
Deoxyribose
B.
Phosphate group
C.
Ribose
D.
Nitrogenous base
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Solution
Ribose is not a component of DNA; it is found in RNA. DNA contains deoxyribose.
Correct Answer:
C
— Ribose
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Q. Which of the following is NOT a component of the cell theory? (2018)
A.
All living things are composed of cells
B.
Cells are the basic unit of life
C.
All cells arise from pre-existing cells
D.
Cells can arise spontaneously from non-living matter
Show solution
Solution
The cell theory states that all living things are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells. Spontaneous generation is not part of the cell theory.
Correct Answer:
D
— Cells can arise spontaneously from non-living matter
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Q. Which of the following is NOT a condition for natural selection to occur?
A.
Variation in traits
B.
Inheritance of traits
C.
Overproduction of offspring
D.
Uniformity of traits
Show solution
Solution
Uniformity of traits is not a condition for natural selection; rather, variation in traits is essential for natural selection to act upon.
Correct Answer:
D
— Uniformity of traits
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Q. Which of the following is NOT a derived unit? (2023)
A.
Newton
B.
Joule
C.
Kilogram
D.
Pascal
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Solution
Kilogram is a fundamental unit, while Newton, Joule, and Pascal are derived units.
Correct Answer:
C
— Kilogram
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Q. Which of the following is not a domain in the three-domain system? (2022)
A.
Bacteria
B.
Eukarya
C.
Archaea
D.
Fungi
Show solution
Solution
Fungi is not a domain; it is a kingdom within the domain Eukarya.
Correct Answer:
D
— Fungi
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Q. Which of the following is not a domain of life? (2022)
A.
Bacteria
B.
Archaea
C.
Eukarya
D.
Viruses
Show solution
Solution
Viruses are not classified as a domain of life.
Correct Answer:
D
— Viruses
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Q. Which of the following is NOT a factor that can lead to evolution? (2020)
A.
Natural Selection
B.
Genetic Drift
C.
Environmental Stability
D.
Mutation
Show solution
Solution
Environmental Stability does not lead to evolution; rather, it is the changes in the environment that drive evolutionary processes.
Correct Answer:
C
— Environmental Stability
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