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 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 polymers? (2023)
A.
High molecular weight
B.
Low melting point
C.
Viscoelasticity
D.
Solubility in water
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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 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
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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
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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
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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
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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
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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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Q. Which of the following is not a feature of the kingdom Protista? (2021)
A.
Eukaryotic
B.
Unicellular or multicellular
C.
Photosynthetic or heterotrophic
D.
Cell wall made of chitin
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Solution
Protista do not have a cell wall made of chitin; this is characteristic of fungi.
Correct Answer: D — Cell wall made of chitin
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Q. Which of the following is not a form of energy? (2020)
A.
Kinetic Energy
B.
Potential Energy
C.
Thermal Energy
D.
Magnetic Field
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Solution
Magnetic field is not a form of energy; it is a field that exerts a force on charged particles.
Correct Answer: D — Magnetic Field
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Q. Which of the following is NOT a function of blood? (2023)
A.
Transporting gases
B.
Regulating body temperature
C.
Producing hormones
D.
Transporting nutrients
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Solution
While blood plays many roles, it does not produce hormones; hormones are produced by glands in the endocrine system.
Correct Answer: C — Producing hormones
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Q. Which of the following is NOT a function of connective tissue? (2022)
A.
Support
B.
Protection
C.
Secretion
D.
Transport
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Solution
Secretion is primarily a function of epithelial tissue, not connective tissue.
Correct Answer: C — Secretion
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Q. Which of the following is NOT a function of cytokinins? (2019)
A.
Promoting cell division
B.
Delaying leaf senescence
C.
Stimulating root growth
D.
Promoting apical dominance
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Solution
Cytokinins do not promote apical dominance; rather, they promote lateral bud growth.
Correct Answer: D — Promoting apical dominance
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Q. Which of the following is NOT a function of iron in plants? (2022)
A.
Chlorophyll synthesis
B.
Electron transport
C.
Cell wall formation
D.
Enzyme activation
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Solution
Iron is not directly involved in cell wall formation; it primarily functions in chlorophyll synthesis and electron transport.
Correct Answer: C — Cell wall formation
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Q. Which of the following is not a function of living organisms? (2023)
A.
Metabolism
B.
Reproduction
C.
Photosynthesis
D.
Inactivity
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Solution
Inactivity is not a function of living organisms; they are characterized by metabolic activity.
Correct Answer: D — Inactivity
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Q. Which of the following is NOT a function of magnesium in plants? (2023)
A.
Chlorophyll formation
B.
Enzyme activation
C.
Water transport
D.
Nutrient uptake
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Solution
Magnesium is not directly involved in water transport; it primarily aids in chlorophyll formation and enzyme activation.
Correct Answer: C — Water transport
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Q. Which of the following is NOT a function of nitrogen in plants? (2023)
A.
Protein synthesis
B.
Photosynthesis
C.
Nucleic acid formation
D.
Chlorophyll production
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Solution
While nitrogen is essential for protein synthesis, nucleic acids, and chlorophyll production, it does not directly participate in the photosynthesis process.
Correct Answer: B — Photosynthesis
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Q. Which of the following is NOT a function of stems in flowering plants? (2022)
A.
Support
B.
Transport of nutrients
C.
Photosynthesis
D.
Water absorption
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Solution
Stems primarily support the plant, transport nutrients and water, but do not absorb water; this is the function of roots.
Correct Answer: D — Water absorption
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Q. Which of the following is NOT a function of the cell membrane? (2022)
A.
Transport of materials
B.
Cell communication
C.
Energy production
D.
Barrier to external environment
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Solution
The cell membrane does not produce energy; it primarily functions in transport, communication, and acting as a barrier.
Correct Answer: C — Energy production
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Q. Which of the following is NOT a function of the endoplasmic reticulum? (2022)
A.
Protein synthesis
B.
Lipid synthesis
C.
Detoxification
D.
Photosynthesis
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Solution
Photosynthesis is not a function of the endoplasmic reticulum; it occurs in chloroplasts.
Correct Answer: D — Photosynthesis
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Q. Which of the following is not a function of the liver in digestion? (2022)
A.
Production of bile
B.
Detoxification
C.
Storage of glucose
D.
Digestion of proteins
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Solution
The liver does not directly digest proteins; it produces bile and performs other functions.
Correct Answer: D — Digestion of proteins
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Q. Which of the following is not a function of the liver? (2022)
A.
Detoxification
B.
Bile production
C.
Protein synthesis
D.
Digestion of carbohydrates
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Solution
The liver does not directly digest carbohydrates; it plays roles in detoxification, bile production, and protein synthesis.
Correct Answer: D — Digestion of carbohydrates
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