Q. Which alkaline earth metal is known for its use in the production of lightweight alloys? (2023)
-
A.
Calcium
-
B.
Barium
-
C.
Magnesium
-
D.
Strontium
Solution
Magnesium is widely used in the production of lightweight alloys due to its low density.
Correct Answer: C — Magnesium
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Q. Which alkaline earth metal is used in fireworks for its bright flame? (2021)
-
A.
Barium
-
B.
Calcium
-
C.
Strontium
-
D.
Magnesium
Solution
Strontium (Sr) is used in fireworks to produce a bright red flame.
Correct Answer: C — Strontium
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Q. Which alkaline earth metal is used in fireworks for producing a bright red flame? (2023)
-
A.
Strontium
-
B.
Calcium
-
C.
Barium
-
D.
Magnesium
Solution
Strontium compounds are used in fireworks to produce a bright red flame.
Correct Answer: A — Strontium
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Q. Which alkaline earth metal is used in fireworks for producing a bright white light? (2023)
-
A.
Barium
-
B.
Calcium
-
C.
Strontium
-
D.
Magnesium
Solution
Strontium is used in fireworks to produce a bright red flame.
Correct Answer: C — Strontium
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Q. Which amine is derived from an aromatic compound? (2023)
-
A.
Aniline
-
B.
Ethylamine
-
C.
Methylamine
-
D.
Propylamine
Solution
Aniline is derived from an aromatic compound (benzene) and contains an amino group.
Correct Answer: A — Aniline
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Q. Which biomolecule is involved in catalyzing biochemical reactions? (2022)
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A.
Carbohydrates
-
B.
Proteins
-
C.
Nucleic acids
-
D.
Lipids
Solution
Proteins, specifically enzymes, catalyze biochemical reactions.
Correct Answer: B — Proteins
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Q. Which biomolecule is involved in the formation of cell membranes? (2020)
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Lipids, particularly phospholipids, are essential for cell membrane structure.
Correct Answer: C — Lipids
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Q. Which biomolecule is made up of fatty acids and glycerol? (2022)
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Lipids are composed of fatty acids and glycerol, forming structures like triglycerides.
Correct Answer: C — Lipids
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Q. Which biomolecule is made up of nucleotides? (2019)
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are made of nucleotides.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily involved in energy transfer? (2019)
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Carbohydrates are primarily involved in energy transfer.
Correct Answer: B — Carbohydrates
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Q. Which biomolecule is primarily used for energy in living organisms? (2019)
-
A.
Proteins
-
B.
Carbohydrates
-
C.
Nucleic acids
-
D.
Lipids
Solution
Carbohydrates are the primary source of energy for living organisms.
Correct Answer: B — Carbohydrates
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Q. Which biotechnological application is used to produce insulin? (2018)
-
A.
Fermentation
-
B.
Gene cloning
-
C.
Cell culture
-
D.
Bioremediation
Solution
Gene cloning is used to produce insulin by inserting the human insulin gene into bacteria, which then produce insulin.
Correct Answer: B — Gene cloning
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Q. Which blood type is known as the universal donor? (2019)
-
A.
Type A
-
B.
Type B
-
C.
Type AB
-
D.
Type O
Solution
Type O blood is known as the universal donor because it lacks A and B antigens, making it safe for transfusion to any blood type.
Correct Answer: D — Type O
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Q. Which carboxylic acid is found in citrus fruits? (2023)
-
A.
Acetic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Citric acid is the carboxylic acid found in citrus fruits, contributing to their sour taste.
Correct Answer: B — Citric acid
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Q. Which carboxylic acid is known for its role in the Krebs cycle? (2019)
-
A.
Citric acid
-
B.
Acetic acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Citric acid plays a crucial role in the Krebs cycle, which is a key metabolic pathway.
Correct Answer: A — Citric acid
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Q. Which carboxylic acid is known for its use in the food industry as a preservative? (2023)
-
A.
Citric acid
-
B.
Acetic acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Acetic acid is widely used in the food industry as a preservative and flavoring agent.
Correct Answer: B — Acetic acid
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Q. Which carboxylic acid is known for its use in the production of biodiesel? (2023)
-
A.
Palmitic acid
-
B.
Stearic acid
-
C.
Oleic acid
-
D.
Linoleic acid
Solution
Oleic acid is commonly used in the production of biodiesel due to its favorable properties.
Correct Answer: C — Oleic acid
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Q. Which carboxylic acid is known for its use in the production of nylon? (2019)
-
A.
Adipic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Acetic acid
Solution
Adipic acid is used in the production of nylon, particularly nylon 6,6.
Correct Answer: A — Adipic acid
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Q. Which carboxylic acid is responsible for the sour taste in citrus fruits? (2020)
-
A.
Citric acid
-
B.
Acetic acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Citric acid is responsible for the sour taste in citrus fruits.
Correct Answer: A — Citric acid
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Q. Which carboxylic acid is responsible for the sour taste in sour milk? (2020)
-
A.
Lactic acid
-
B.
Acetic acid
-
C.
Citric acid
-
D.
Formic acid
Solution
Lactic acid is produced during the fermentation of lactose in sour milk, giving it a sour taste.
Correct Answer: A — Lactic acid
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Q. Which carboxylic acid is used in the production of nylon? (2023)
-
A.
Hexanoic acid
-
B.
Adipic acid
-
C.
Citric acid
-
D.
Acetic acid
Solution
Adipic acid is used in the production of nylon, specifically nylon-6,6.
Correct Answer: B — Adipic acid
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Q. Which checkpoint in the cell cycle ensures that DNA is not damaged before replication? (2023)
-
A.
G1 checkpoint
-
B.
G2 checkpoint
-
C.
M checkpoint
-
D.
S checkpoint
Solution
The G1 checkpoint assesses the cell's size and DNA integrity before it enters the S phase for replication.
Correct Answer: A — G1 checkpoint
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Q. Which class of animals is characterized by having scales and laying eggs on land? (2022)
-
A.
Amphibia
-
B.
Reptilia
-
C.
Aves
-
D.
Mammalia
Solution
Reptiles are characterized by having scales and typically lay eggs on land.
Correct Answer: B — Reptilia
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Q. Which class of animals is characterized by the presence of scales? (2023)
-
A.
Amphibia
-
B.
Reptilia
-
C.
Aves
-
D.
Mammalia
Solution
Reptiles are characterized by the presence of scales, which help in protection and water retention.
Correct Answer: B — Reptilia
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Q. Which class of animals is known for having a three-chambered heart? (2023)
-
A.
Mammals
-
B.
Birds
-
C.
Reptiles
-
D.
Amphibians
Solution
Reptiles typically have a three-chambered heart, except for crocodilians which have a four-chambered heart.
Correct Answer: C — Reptiles
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Q. Which class of animals is known for having scales and laying eggs on land? (2022)
-
A.
Amphibia
-
B.
Reptilia
-
C.
Aves
-
D.
Mammalia
Solution
Reptiles (Reptilia) are known for having scales and typically lay eggs on land, adapting to terrestrial life.
Correct Answer: B — Reptilia
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Q. Which class of the phylum Chordata includes animals that are warm-blooded? (2023)
-
A.
Reptilia
-
B.
Amphibia
-
C.
Aves
-
D.
Osteichthyes
Solution
Class Aves (birds) are warm-blooded, maintaining a constant body temperature.
Correct Answer: C — Aves
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Q. Which class of the phylum Chordata is characterized by the presence of feathers? (2023)
-
A.
Mammalia
-
B.
Reptilia
-
C.
Aves
-
D.
Amphibia
Solution
Class Aves is characterized by the presence of feathers, which are unique to birds.
Correct Answer: C — Aves
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Q. Which component of blood is primarily responsible for the immune response? (2020)
-
A.
Plasma
-
B.
Red blood cells
-
C.
White blood cells
-
D.
Platelets
Solution
White blood cells, or leukocytes, are the key players in the immune response, helping to defend the body against infections.
Correct Answer: C — White blood cells
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Q. Which component of blood is responsible for the immune response? (2020)
-
A.
Plasma
-
B.
Red blood cells
-
C.
White blood cells
-
D.
Platelets
Solution
White blood cells (leukocytes) are responsible for the immune response, helping to fight infections and foreign substances.
Correct Answer: C — White blood cells
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