Q. Which of the following is a biotechnological application in environmental management? (2022)
A.
Bioremediation
B.
Gene therapy
C.
Cloning
D.
Transgenic animals
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Solution
Bioremediation uses microorganisms to degrade environmental contaminants, making it a key application in environmental management.
Correct Answer: A — Bioremediation
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Q. Which of the following is a biotechnological application in medicine? (2019)
A.
Gene therapy
B.
Bioremediation
C.
Biofuels
D.
Plant breeding
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Solution
Gene therapy is a direct application of biotechnology in medicine, aimed at treating genetic disorders.
Correct Answer: A — Gene therapy
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Q. Which of the following is a biotechnological method for waste management? (2022)
A.
Bioremediation
B.
Cloning
C.
PCR
D.
Gene editing
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Solution
Bioremediation uses microorganisms to degrade environmental contaminants, making it a method for waste management.
Correct Answer: A — Bioremediation
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Q. Which of the following is a biotechnological method used for the production of vaccines? (2021)
A.
Fermentation
B.
Cloning
C.
Gene therapy
D.
DNA sequencing
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Solution
Fermentation is a biotechnological method used to produce vaccines by cultivating microorganisms.
Correct Answer: A — Fermentation
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Q. Which of the following is a biotic component of an ecosystem? (2021)
A.
Soil
B.
Water
C.
Plants
D.
Air
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Solution
Plants are biotic components of an ecosystem, while soil, water, and air are abiotic components.
Correct Answer: C — Plants
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Q. Which of the following is a biotic factor in an ecosystem? (2020)
A.
Temperature
B.
Soil pH
C.
Plants
D.
Water availability
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Solution
Biotic factors are the living components of an ecosystem, which include plants, animals, and microorganisms.
Correct Answer: C — Plants
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Q. Which of the following is a branched alkane?
A.
Pentane
B.
Isopentane
C.
Hexane
D.
Heptane
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Solution
Isopentane is a branched alkane, while the others are straight-chain alkanes.
Correct Answer: B — Isopentane
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Q. Which of the following is a branched-chain alkane?
A.
Pentane
B.
2-Methylbutane
C.
Hexane
D.
Heptane
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Solution
2-Methylbutane is a branched-chain alkane derived from butane.
Correct Answer: B — 2-Methylbutane
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Q. Which of the following is a carbohydrate?
A.
Glucose
B.
Amino acid
C.
Fatty acid
D.
Nucleotide
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Solution
Glucose is a simple sugar and a primary carbohydrate.
Correct Answer: A — Glucose
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Q. Which of the following is a carbohydrate? (2023) 2023
A.
Glucose
B.
Amino acid
C.
Fatty acid
D.
Nucleotide
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Solution
Glucose is a simple sugar and a primary carbohydrate.
Correct Answer: A — Glucose
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Q. Which of the following is a carboxylic acid?
A.
C2H5OH
B.
C3H6O
C.
C2H4O2
D.
C3H8
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Solution
C2H4O2 (Acetic acid) is a carboxylic acid.
Correct Answer: C — C2H4O2
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Q. Which of the following is a characteristic feature of alkanes?
A.
They contain at least one double bond
B.
They are saturated hydrocarbons
C.
They have a cyclic structure
D.
They contain functional groups
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Solution
Alkanes are saturated hydrocarbons, meaning they contain only single bonds between carbon atoms.
Correct Answer: B — They are saturated hydrocarbons
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Q. Which of the following is a characteristic feature of all living organisms? (2019)
A.
Ability to move
B.
Ability to reproduce
C.
Ability to respond to stimuli
D.
Ability to photosynthesize
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Solution
The ability to reproduce is a characteristic feature of all living organisms.
Correct Answer: B — Ability to reproduce
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Q. Which of the following is a characteristic feature of cycloalkanes?
A.
They are always aromatic
B.
They contain a ring structure
C.
They have double bonds
D.
They are always gaseous at room temperature
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Solution
Cycloalkanes are characterized by their ring structure.
Correct Answer: B — They contain a ring structure
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Q. Which of the following is a characteristic feature of echinoderms? (2021)
A.
Bilateral symmetry
B.
Water vascular system
C.
Exoskeleton made of chitin
D.
Presence of feathers
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Solution
Echinoderms, such as starfish and sea urchins, are characterized by a water vascular system, which aids in movement and feeding.
Correct Answer: B — Water vascular system
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Q. Which of the following is a characteristic feature of epithelial tissue? (2020)
A.
Highly vascularized
B.
Cells are tightly packed
C.
Presence of a matrix
D.
Ability to contract
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Solution
Epithelial tissue is characterized by closely packed cells with minimal intercellular space, forming a protective layer.
Correct Answer: B — Cells are tightly packed
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Q. Which of the following is a characteristic feature of fungi? (2021)
A.
Photosynthesis
B.
Chitin in cell walls
C.
Multicellular only
D.
Autotrophic nutrition
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Solution
Fungi have chitin in their cell walls, distinguishing them from plants.
Correct Answer: B — Chitin in cell walls
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Q. Which of the following is a characteristic feature of living organisms? (2019)
A.
Ability to move
B.
Ability to grow
C.
Ability to respond to stimuli
D.
All of the above
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Solution
All of the options listed are characteristic features of living organisms.
Correct Answer: D — All of the above
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Q. Which of the following is a characteristic feature of phylum Arthropoda? (2020)
A.
Presence of a notochord
B.
Body divided into segments
C.
Presence of a true coelom
D.
Radial symmetry
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Solution
Phylum Arthropoda is characterized by a segmented body, jointed appendages, and an exoskeleton made of chitin.
Correct Answer: B — Body divided into segments
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Q. Which of the following is a characteristic feature of Romanesque architecture?
A.
Large stained glass windows
B.
Thick walls and small windows
C.
Pointed arches
D.
Elaborate ornamentation
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Solution
Romanesque architecture is characterized by thick walls, small windows, and rounded arches, contrasting with the later Gothic style.
Correct Answer: B — Thick walls and small windows
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Q. Which of the following is a characteristic feature of the kingdom Plantae? (2021)
A.
Heterotrophic nutrition
B.
Photosynthesis
C.
Unicellular organisms
D.
Motility
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Solution
Photosynthesis is a characteristic feature of the kingdom Plantae, as plants are autotrophic and produce their own food using sunlight.
Correct Answer: B — Photosynthesis
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Q. Which of the following is a characteristic feature of viruses? (2020)
A.
Cellular structure
B.
Metabolism
C.
Reproduction without a host
D.
Protein coat
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Solution
Viruses have a protein coat (capsid) and lack cellular structure and metabolism, requiring a host to reproduce.
Correct Answer: D — Protein coat
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Q. Which of the following is a characteristic of +M effect?
A.
Electron withdrawal
B.
Electron donation
C.
No effect
D.
Increased acidity
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Solution
+M effect is characterized by electron donation through resonance, enhancing stability.
Correct Answer: B — Electron donation
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Q. Which of the following is a characteristic of a base?
A.
Sour taste
B.
Bitter taste
C.
Turns litmus red
D.
Reacts with metals to produce hydrogen
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Solution
Bases typically have a bitter taste and turn litmus paper blue.
Correct Answer: B — Bitter taste
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Q. Which of the following is a characteristic of a black body?
A.
Reflects all radiation
B.
Absorbs all radiation
C.
Transmits all radiation
D.
Scatters all radiation
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Solution
A black body is defined as an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
Correct Answer: B — Absorbs all radiation
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Q. Which of the following is a characteristic of a buffer solution?
A.
It changes pH drastically with small amounts of acid or base
B.
It resists changes in pH
C.
It has a pH of 7
D.
It can only be made from strong acids and bases
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Solution
A buffer solution is designed to resist changes in pH when small amounts of acid or base are added.
Correct Answer: B — It resists changes in pH
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Q. Which of the following is a characteristic of a catalyst?
A.
It is consumed in the reaction
B.
It increases the activation energy
C.
It lowers the activation energy
D.
It changes the equilibrium constant
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Solution
A catalyst lowers the activation energy of a reaction, thereby increasing the rate.
Correct Answer: C — It lowers the activation energy
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Q. Which of the following is a characteristic of a crystalline solid compared to a liquid?
A.
Definite melting point
B.
Fluidity
C.
High compressibility
D.
Random arrangement of particles
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Solution
Crystalline solids have a definite melting point due to their ordered structure.
Correct Answer: A — Definite melting point
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Q. Which of the following is a characteristic of a diode? (2023)
A.
Allows current to flow in both directions
B.
Allows current to flow in one direction
C.
Has no resistance
D.
Is a superconductor
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Solution
A diode allows current to flow in one direction only, making it a unidirectional device.
Correct Answer: B — Allows current to flow in one direction
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Q. Which of the following is a characteristic of a first-order reaction?
A.
Rate is proportional to the square of the concentration
B.
Rate is independent of concentration
C.
Rate is directly proportional to concentration
D.
Rate is inversely proportional to concentration
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Solution
In a first-order reaction, the rate is directly proportional to the concentration of the reactant.
Correct Answer: C — Rate is directly proportional to concentration
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