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Past Papers MCQs

GSA

2025

MCQs

Question 1
‘Blue dwarfs’ and ‘Red giants’ respectively refer to:
  • Moons of Jupiter
  • Young star and Old star
  • Old star and Young star
  • None of these
Explanation: Blue dwarfs are hypothetical evolved stars representing a hotter stage, while red giants are older stars that expand after exhausting hydrogen fuel.
Question 2
Most major Tsunamis are produced by earthquakes with hypocenters less than:
  • 30 km
  • 40 km
  • 50 km
  • None of these
Explanation: Shallow earthquakes (less than 30 km depth) displace large volumes of seawater, making them the primary cause of major tsunamis.
Question 3
Which of the following source of energy is caused by uneven heating of earth’s surface?
  • Wind
  • Solar
  • Biomass
  • None of these
Explanation: Uneven heating of the Earth creates pressure differences that generate wind energy.
Question 4
Global winds towards the western direction are known as:
  • Trade winds
  • Western winds
  • Reynolds wind
  • None of these
Explanation: Trade winds blow from east to west in tropical regions due to Earth’s rotation and pressure gradients.
Correction Note: The originally marked answer was incorrect. The correct answer is A.
Question 5
Perinatal transmission is said to occur when a pathogen is transmitted from:
  • Non-human to human
  • Infected to uninfected
  • Mother to infant
  • None of these
Explanation: Perinatal transmission refers to the transfer of infection from mother to infant during pregnancy, childbirth, or breastfeeding.
Question 6
Which of the plant groups needs both land and water to complete their life cycle?
  • Bryophyta
  • Tracheophyta
  • Thallophyta
  • None of these
Explanation: Bryophytes require water for reproduction, yet live primarily on land, making them dependent on both environments.
Question 7
Maximum amount of carbohydrates is obtained from:
  • Nuts
  • Plant oil
  • Whole-grain food
  • None of these
Explanation: Whole grains are rich in complex carbohydrates, serving as the primary dietary source of energy.
Question 8
Which of the following classes has the largest number of animals?
  • Fishes
  • Insects
  • Mammals
  • None of these
Explanation: Insects constitute the largest class of animals with the highest number of species worldwide.
Question 9
The process of preserving meat by stewing in a covered earthenware jug is called:
  • Burial
  • Juggling
  • Curing
  • None of these
Explanation: Jugging is a traditional method of preserving meat by slow cooking it in a sealed earthenware container.
Question 10
All operating systems get their total memory initialized from:
  • BIOS
  • RAM
  • ROM
  • CPU
Explanation: BIOS initializes and tests system memory during booting before handing control to the operating system.
Question 11
The amount of data transmitted for a given amount of time is called:
  • Noise
  • Bandwidth
  • Frequency
  • None of these
Explanation: Bandwidth refers to the rate of data transfer over a network within a specified time period.
Question 12
Which of the following products can be prepared using raw guava?
  • Jam
  • Jelly
  • Both (A) and (B)
  • None of these
Explanation: Raw guava contains sufficient pectin to prepare both jam (from pulp) and jelly (from juice).
Question 13
Which of the following is used as a stabilizer in ice cream?
  • Sugar
  • Milk
  • Gelatin
  • None of these
Explanation: Gelatin acts as a stabilizer in ice cream by preventing ice crystal formation and improving texture.
Question 14
In the structure of fiber, the light is guided through the core due to the total internal reflection:
  • Reflection
  • Refraction
  • Diffraction
  • None of these
Explanation: Optical fibers guide light through total internal reflection within the core due to refractive index differences.
Question 15
Who is known as the inventor of Artificial Intelligence?
  • Charles Babbage
  • John McCarthy
  • Alan Turing
  • None of these
Explanation: John McCarthy coined the term Artificial Intelligence and pioneered the field through the Dartmouth Conference.
Question 16
Which of the following is the common language for Artificial Intelligence?
  • Java
  • Python
  • Lisp
  • None of these
Explanation: Python is the most widely used AI language today due to its simplicity and powerful libraries.
Question 17
Cement factory labourers are prone to:
  • Leukemia
  • Cytosilicosis
  • Bone marrow
  • None of these
Explanation: Cement workers are prone to silicosis, a lung disease caused by inhalation of fine silica dust.
Question 18
The fastest enzyme is:
  • Pepsin
  • DNA polymerase
  • Carbonic anhydrase
  • None of these
Explanation: Carbonic anhydrase is one of the fastest enzymes, catalyzing reactions at extremely high rates.
Question 19
The process of adding vitamins to milk is known as:
  • Flavoring
  • Fortification
  • Fermentation
  • None of these
Explanation: Fortification enhances the nutritional value of milk by adding essential vitamins.
Question 20
The waves that are used for line of sight (LOS) communication are called:
  • Space waves
  • Cable waves
  • Antenna waves
  • None of these
Explanation: Space waves travel directly between antennas and are used in line-of-sight communication systems.