Q. Which of the following is NOT a part of the flower? (2023)
-
A.
Stamen
-
B.
Pistil
-
C.
Root
-
D.
Petal
Solution
The root is not a part of the flower; it is part of the plant's root system.
Correct Answer: C — Root
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Q. Which of the following is NOT a part of the male reproductive system? (2022)
-
A.
Testes
-
B.
Prostate gland
-
C.
Ovary
-
D.
Seminal vesicle
Solution
The ovary is not a part of the male reproductive system; it is part of the female reproductive system.
Correct Answer: C — Ovary
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Q. Which of the following is NOT a product of biotechnology? (2022)
-
A.
Antibiotics
-
B.
Hormones
-
C.
Synthetic fibers
-
D.
Fossil fuels
Solution
Fossil fuels are not products of biotechnology; they are natural resources formed from ancient organic matter.
Correct Answer: D — Fossil fuels
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Q. Which of the following is NOT a product of cellular respiration? (2021)
-
A.
ATP
-
B.
Water
-
C.
Glucose
-
D.
Carbon dioxide
Solution
Glucose is not a product of cellular respiration; it is a reactant that is broken down to produce ATP, water, and carbon dioxide.
Correct Answer: C — Glucose
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Q. Which of the following is NOT a product of microbial fermentation? (2022)
-
A.
Yogurt
-
B.
Bread
-
C.
Vinegar
-
D.
Sugar
Solution
Sugar is not a product of microbial fermentation; it is a substrate that microbes ferment.
Correct Answer: D — Sugar
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Q. Which of the following is NOT a property of metals? (2021)
-
A.
Good electrical conductivity
-
B.
Brittleness
-
C.
Malleability
-
D.
Ductility
Solution
Brittleness is not a property of metals; they are typically malleable and ductile.
Correct Answer: B — Brittleness
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Q. Which of the following is not a property of nitrogen? (2023)
-
A.
Colorless gas
-
B.
Odorless
-
C.
Supports combustion
-
D.
Diatomic molecule
Solution
Nitrogen is colorless, odorless, and diatomic, but it does not support combustion.
Correct Answer: C — Supports combustion
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Q. Which of the following is NOT a property of thermoplastics? (2022)
-
A.
Can be remolded
-
B.
Softens on heating
-
C.
Hardens on cooling
-
D.
Brittle at room temperature
Solution
Thermoplastics are generally not brittle at room temperature; they can be reshaped upon heating.
Correct Answer: D — Brittle at room temperature
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Q. Which of the following is NOT a sexually transmitted disease? (2020)
-
A.
Syphilis
-
B.
Gonorrhea
-
C.
Hepatitis B
-
D.
Tuberculosis
Solution
Tuberculosis is primarily a respiratory disease and is not classified as a sexually transmitted disease.
Correct Answer: D — Tuberculosis
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Q. Which of the following is NOT a sexually transmitted infection? (2020)
-
A.
HIV
-
B.
Syphilis
-
C.
Tuberculosis
-
D.
Gonorrhea
Solution
Tuberculosis is not a sexually transmitted infection; it is primarily a respiratory disease.
Correct Answer: C — Tuberculosis
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Q. Which of the following is NOT a stage of cellular respiration? (2021)
-
A.
Glycolysis
-
B.
Krebs cycle
-
C.
Electron transport chain
-
D.
Calvin cycle
Solution
The Calvin cycle is part of photosynthesis, not cellular respiration.
Correct Answer: D — Calvin cycle
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Q. Which of the following is NOT a stage of the cell cycle? (2019)
-
A.
Interphase
-
B.
Prophase
-
C.
Cytokinesis
-
D.
Synthesis
Solution
Synthesis is not a stage of the cell cycle; it refers to the S phase where DNA is replicated.
Correct Answer: D — Synthesis
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Q. Which of the following is not a step in the process of condensation polymerization? (2023)
-
A.
Formation of a covalent bond
-
B.
Elimination of a small molecule
-
C.
Addition of monomers
-
D.
Rearrangement of functional groups
Solution
Addition of monomers is not a step in condensation polymerization; it is characteristic of addition polymerization.
Correct Answer: C — Addition of monomers
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Q. Which of the following is NOT a step in the process of gene cloning? (2020)
-
A.
Isolation of DNA
-
B.
Transformation
-
C.
Transcription
-
D.
Insertion of DNA into a vector
Solution
Transcription is the process of synthesizing RNA from DNA, which is not a step in gene cloning.
Correct Answer: C — Transcription
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Q. Which of the following is NOT a step in the process of recombinant DNA technology? (2020)
-
A.
Isolation of DNA
-
B.
Ligation of DNA fragments
-
C.
Transformation of host cells
-
D.
Protein synthesis
Solution
Protein synthesis is not a step in recombinant DNA technology; the process focuses on manipulating DNA rather than directly synthesizing proteins.
Correct Answer: D — Protein synthesis
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Q. Which of the following is NOT a symptom of diabetes? (2020)
-
A.
Increased thirst
-
B.
Frequent urination
-
C.
Weight gain
-
D.
Fatigue
Solution
Weight gain is not a typical symptom of diabetes; rather, weight loss is more common in type 1 diabetes.
Correct Answer: C — Weight gain
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Q. Which of the following is NOT a type of connective tissue? (2023)
-
A.
Blood
-
B.
Bone
-
C.
Cartilage
-
D.
Epithelial
Solution
Epithelial tissue is not a type of connective tissue; it serves as a protective layer and is distinct from connective tissues.
Correct Answer: D — Epithelial
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Q. Which of the following is NOT a type of crystal system? (2021)
-
A.
Cubic
-
B.
Tetragonal
-
C.
Hexagonal
-
D.
Quadratic
Solution
Quadratic is not a recognized type of crystal system; the correct systems include cubic, tetragonal, hexagonal, orthorhombic, and others.
Correct Answer: D — Quadratic
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Q. Which of the following is NOT a type of crystalline solid? (2021)
-
A.
Ionic
-
B.
Molecular
-
C.
Amorphous
-
D.
Metallic
Solution
Amorphous solids do not have a long-range order and are not classified as crystalline solids.
Correct Answer: C — Amorphous
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Q. Which of the following is NOT a type of inheritance pattern? (2021)
-
A.
Incomplete dominance
-
B.
Codominance
-
C.
Polygenic inheritance
-
D.
Transgenic inheritance
Solution
Transgenic inheritance is not a recognized pattern of inheritance; it refers to organisms that have been genetically modified.
Correct Answer: D — Transgenic inheritance
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Q. Which of the following is NOT a type of simple permanent tissue? (2019)
-
A.
Parenchyma
-
B.
Collenchyma
-
C.
Sclerenchyma
-
D.
Xylem
Solution
Xylem is a complex tissue, while parenchyma, collenchyma, and sclerenchyma are types of simple permanent tissues.
Correct Answer: D — Xylem
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Q. Which of the following is NOT a type of transport in plants?
-
A.
Active transport
-
B.
Passive transport
-
C.
Facilitated diffusion
-
D.
Electrolysis
Solution
Electrolysis is not a type of transport in plants; it is a chemical process involving the decomposition of substances.
Correct Answer: D — Electrolysis
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Q. Which of the following is NOT a use of microbes in agriculture? (2023)
-
A.
Nitrogen fixation
-
B.
Biopesticides
-
C.
Soil fertility enhancement
-
D.
Water pollution
Solution
Water pollution is not a use of microbes; rather, microbes can help improve soil fertility and act as biopesticides.
Correct Answer: D — Water pollution
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Q. Which of the following is NOT a use of microbes in human welfare? (2023)
-
A.
Bioremediation
-
B.
Food production
-
C.
Genetic engineering
-
D.
Causing infections
Solution
Causing infections is not a beneficial use of microbes; it is a harmful effect.
Correct Answer: D — Causing infections
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Q. Which of the following is not found in prokaryotic cells? (2022)
-
A.
Ribosomes
-
B.
Nucleus
-
C.
Plasma Membrane
-
D.
Cytoplasm
Solution
Prokaryotic cells do not have a nucleus; their genetic material is not enclosed within a membrane.
Correct Answer: B — Nucleus
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Q. Which of the following is the correct dimension for pressure? (2021)
-
A.
M^1L^-1T^-2
-
B.
M^1L^1T^-2
-
C.
M^1L^0T^-2
-
D.
M^0L^1T^-1
Solution
Pressure is defined as force per unit area, hence its dimension is M^1L^-1T^-2.
Correct Answer: A — M^1L^-1T^-2
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Q. Which of the following is the correct dimension for velocity? (2021)
-
A.
M^1L^1T^-1
-
B.
M^0L^1T^-1
-
C.
M^1L^0T^-1
-
D.
M^1L^1T^0
Solution
The dimension of velocity is M^0L^1T^-1.
Correct Answer: B — M^0L^1T^-1
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Q. Which of the following is the correct expression for gravitational potential energy (U) of an object of mass m at a height h? (2020)
-
A.
mgh
-
B.
mg/h
-
C.
mgh^2
-
D.
m^2gh
Solution
The gravitational potential energy is given by U = mgh, where h is the height above the reference point.
Correct Answer: A — mgh
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Q. Which of the following is the correct IUPAC name for CH3-CH2-CH(OH)-CH3? (2020)
-
A.
2-butanol
-
B.
1-butanol
-
C.
3-butanol
-
D.
2-pentanol
Solution
The compound CH3-CH2-CH(OH)-CH3 is 2-butanol, as the hydroxyl group is on the second carbon.
Correct Answer: A — 2-butanol
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Q. Which of the following is the correct method to prepare phenol? (2022)
-
A.
Hydrolysis of chlorobenzene
-
B.
Oxidation of benzyl alcohol
-
C.
Reduction of benzoic acid
-
D.
Dehydration of phenyl ethanol
Solution
Phenol can be prepared by the hydrolysis of chlorobenzene using sodium hydroxide.
Correct Answer: A — Hydrolysis of chlorobenzene
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