Q. Which of the following is NOT a stage of the cell cycle? (2019)
A.
Interphase
B.
Prophase
C.
Cytokinesis
D.
Synthesis
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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 cloning? (2020)
A.
Isolation of DNA
B.
Transformation
C.
Selection of clones
D.
Transcription
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Solution
Transcription is not a step in the cloning process; cloning involves isolation, transformation, and selection of clones.
Correct Answer:
D
— Transcription
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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 an alkaline earth metal? (2020)
A.
Barium
B.
Strontium
C.
Calcium
D.
Aluminum
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Solution
Aluminum (Al) is not an alkaline earth metal; it is a post-transition metal.
Correct Answer:
D
— Aluminum
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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
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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
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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
Show solution
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
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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
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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
Show solution
Solution
Phenol can be prepared by the hydrolysis of chlorobenzene using sodium hydroxide.
Correct Answer:
A
— Hydrolysis of chlorobenzene
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Q. Which of the following is the correct order of magnitude for the speed of light? (2023)
A.
10^6 m/s
B.
10^8 m/s
C.
10^10 m/s
D.
10^12 m/s
Show solution
Solution
The speed of light is approximately 3 x 10^8 m/s.
Correct Answer:
B
— 10^8 m/s
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Q. Which of the following is the correct order of reactivity of haloalkanes in nucleophilic substitution reactions? (2023)
A.
R-I > R-Br > R-Cl > R-F
B.
R-F > R-Cl > R-Br > R-I
C.
R-Cl > R-Br > R-I > R-F
D.
R-Br > R-I > R-Cl > R-F
Show solution
Solution
The reactivity of haloalkanes in nucleophilic substitution reactions decreases in the order R-I > R-Br > R-Cl > R-F due to bond strength.
Correct Answer:
A
— R-I > R-Br > R-Cl > R-F
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Q. Which of the following is the correct order of reactivity of haloalkanes towards nucleophilic substitution? (2021)
A.
R-I > R-Br > R-Cl > R-F
B.
R-F > R-Cl > R-Br > R-I
C.
R-Cl > R-Br > R-I > R-F
D.
R-Br > R-I > R-Cl > R-F
Show solution
Solution
The reactivity of haloalkanes towards nucleophilic substitution is primarily determined by the bond strength of the carbon-halogen bond. Iodine has the weakest bond, making R-I the most reactive, followed by R-Br, R-Cl, and R-F.
Correct Answer:
A
— R-I > R-Br > R-Cl > R-F
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Q. Which of the following is the correct representation of 0.001 in scientific notation? (2023)
A.
1 x 10^-3
B.
1 x 10^3
C.
1 x 10^1
D.
1 x 10^-1
Show solution
Solution
0.001 can be represented as 1 x 10^-3 in scientific notation.
Correct Answer:
A
— 1 x 10^-3
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Q. Which of the following is the correct representation of the unit of energy? (2019)
A.
Joule
B.
Newton-meter
C.
Both A and B
D.
None of the above
Show solution
Solution
Both Joule and Newton-meter represent the same unit of energy.
Correct Answer:
C
— Both A and B
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Q. Which of the following is the correct structure for propan-2-one? (2020)
A.
CH3COCH3
B.
CH3CHO
C.
C2H5CHO
D.
C3H6O
Show solution
Solution
Propan-2-one, also known as acetone, has the structure CH3COCH3, indicating it is a ketone.
Correct Answer:
A
— CH3COCH3
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Q. Which of the following is the correct unit for measuring frequency? (2022)
A.
Hertz
B.
Joule
C.
Watt
D.
Newton
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Solution
The unit for measuring frequency is Hertz (Hz).
Correct Answer:
A
— Hertz
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Q. Which of the following is the correct unit for measuring pressure? (2020)
A.
Pascal
B.
Joule
C.
Newton
D.
Watt
Show solution
Solution
The SI unit for measuring pressure is Pascal (Pa).
Correct Answer:
A
— Pascal
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Q. Which of the following is the correct unit for pressure? (2020)
A.
Pascal
B.
Joule
C.
Newton
D.
Watt
Show solution
Solution
The SI unit for pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer:
A
— Pascal
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