Major Competitive Exams

Q. What is the primary function of a transistor?
  • A. Rectification
  • B. Amplification
  • C. Capacitance
  • D. Inductance
Q. What is the primary function of a transponder in satellite communication?
  • A. To amplify the signal
  • B. To receive and retransmit signals
  • C. To modulate the signal
  • D. To filter out noise
Q. What is the primary function of an antenna in a communication system?
  • A. To amplify the signal
  • B. To convert electrical signals into electromagnetic waves
  • C. To modulate the signal
  • D. To demodulate the signal
Q. What is the primary function of antacids?
  • A. To relieve pain
  • B. To reduce acidity
  • C. To increase appetite
  • D. To promote digestion
Q. What is the primary function of antioxidants in food? (2022)
  • A. Enhance flavor
  • B. Preserve color
  • C. Prevent oxidation
  • D. Increase sweetness
Q. What is the primary function of antioxidants in the human body? (2020)
  • A. Increase energy
  • B. Prevent oxidation
  • C. Enhance digestion
  • D. Boost immunity
Q. What is the primary function of auxins in plant growth? (2020)
  • A. Promote flowering
  • B. Stimulate root growth
  • C. Inhibit leaf abscission
  • D. Promote cell division
Q. What is the primary function of baking soda in cooking?
  • A. Thickening agent
  • B. Leavening agent
  • C. Flavor enhancer
  • D. Preservative
Q. What is the primary function of carbohydrates in living organisms?
  • A. Energy storage
  • B. Genetic information
  • C. Catalysis
  • D. Structural support
Q. What is the primary function of ciliated epithelial cells? (2023)
  • A. Absorption
  • B. Secretion
  • C. Movement of substances
  • D. Protection
Q. What is the primary function of cytokinins in plant growth? (2020)
  • A. Promote root growth
  • B. Stimulate cell division
  • C. Inhibit aging
  • D. Enhance fruit ripening
Q. What is the primary function of emulsifiers in food products?
  • A. Thickeners
  • B. Stabilizers
  • C. Flavor enhancers
  • D. Coloring agents
Q. What is the primary function of enzymes in biological systems?
  • A. Store energy
  • B. Speed up chemical reactions
  • C. Provide structural support
  • D. Transport molecules
Q. What is the primary function of enzymes?
  • A. Store energy
  • B. Speed up chemical reactions
  • C. Provide structure
  • D. Transport substances
Q. What is the primary function of fats in the diet?
  • A. Energy storage
  • B. Muscle building
  • C. Bone health
  • D. Immune function
Q. What is the primary function of fluoride in dental care products?
  • A. Whitening teeth
  • B. Preventing cavities
  • C. Freshening breath
  • D. Strengthening gums
Q. What is the primary function of fluoride in dental care?
  • A. Whitening teeth
  • B. Preventing cavities
  • C. Strengthening enamel
  • D. Reducing sensitivity
Q. What is the primary function of glucagon? (2023)
  • A. Increase blood glucose levels
  • B. Decrease blood glucose levels
  • C. Stimulate protein synthesis
  • D. Inhibit fat breakdown
Q. What is the primary function of hemoglobin in the blood? (2019)
  • A. Transport nutrients
  • B. Regulate pH
  • C. Carry oxygen
  • D. Fight infections
Q. What is the primary function of lipids in biological systems?
  • A. Energy storage
  • B. Catalysis
  • C. Genetic information
  • D. Structural support
Q. What is the primary function of lipids in the body? (2021)
  • A. Energy storage
  • B. Genetic information
  • C. Structural support
  • D. Transport
Q. What is the primary function of nervous tissue? (2022)
  • A. Support and protection
  • B. Movement
  • C. Transmission of impulses
  • D. Storage of energy
Q. What is the primary function of parathyroid hormone? (2023)
  • A. Increase calcium levels in blood
  • B. Decrease calcium levels in blood
  • C. Regulate metabolism
  • D. Stimulate growth
Q. What is the primary function of petals in a flower? (2021)
  • A. Support the flower
  • B. Attract pollinators
  • C. Protect the ovary
  • D. Produce nectar
Q. What is the primary function of potassium in plants? (2020)
  • A. Photosynthesis
  • B. Water regulation
  • C. Protein synthesis
  • D. Cell division
Q. What is the primary function of preservatives in food?
  • A. Enhance flavor
  • B. Improve texture
  • C. Prevent spoilage
  • D. Increase nutritional value
Q. What is the primary function of producers in an ecosystem? (2019)
  • A. To consume other organisms
  • B. To decompose organic matter
  • C. To produce energy through photosynthesis
  • D. To compete for resources
Q. What is the primary function of proteins in the body? (2023)
  • A. Energy storage
  • B. Catalyzing biochemical reactions
  • C. Genetic information storage
  • D. Cell membrane structure
Q. What is the primary function of proteins in the body? (2023) 2023
  • A. Energy storage
  • B. Catalyzing biochemical reactions
  • C. Genetic information storage
  • D. Cell membrane structure
Q. What is the primary function of RAM in a computer?
  • A. Store data permanently
  • B. Execute programs
  • C. Provide temporary storage
  • D. Control peripherals
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