🏠 Home ↩ Back
Past Papers MCQs

GSA

2026

MCQs

Question 1
Rapid short-term weather changes are most strongly influenced by:
  • Earth's revolution
  • Atmospheric pressure systems
  • Ocean salinity
  • Axial precession
Explanation: Weather changes are mainly driven by atmospheric pressure systems.
Question 2
The primary structure of a protein is determined by its:
  • Amino acid sequence
  • Hydrogen bonding
  • Ionic interactions
  • Disulfide bridges
Explanation: Primary structure refers to the linear sequence of amino acids.
Question 3
In plants, lignin primarily provides:
  • Water storage
  • Mechanical support
  • Photosynthesis
  • Protein synthesis
Explanation: Lignin strengthens plant cell walls for support.
Question 4
The Montreal Protocol focuses on the reduction of:
  • Carbon dioxide
  • Sulfur emissions
  • Ozone-depleting substances
  • Heavy metals
Explanation: It aims to protect the ozone layer by reducing the production of harmful chemicals.
Question 5
A key indicator of drinking water microbiological safety is:
  • pH
  • Turbidity
  • Hardness
  • E. coli
Explanation: The presence of E. coli indicates contamination.
Question 6
Bioavailability of nutrients in food refers to:
  • Nutrients absorbed by the body
  • Portion size
  • Chemical purity
  • Packaging type
Explanation: It measures how much of a nutrient is absorbed and used.
Question 7
A CPU’s instruction cycle primarily depends on ______ for coordinating all operations:
  • ALU
  • Cache Bus
  • Control Unit
  • I/O Controller
Explanation: The control unit manages instruction execution.
Question 8
The protocol responsible for mapping domain names to IP addresses is:
  • DHCP
  • ARP
  • DNS
  • FTP
Explanation: DNS translates domain names into IP addresses.
Question 9
Knowledge graphs enhance AI reasoning capabilities by representing data as:
  • Unstructured logs
  • Logical rules only
  • Node-edge relationships
  • CPU instruction tables
Explanation: They model data as interconnected nodes and edges.
Question 10
Wind turbines convert which form of energy directly into electricity?
  • Chemical
  • Nuclear
  • Thermal
  • Kinetic
Explanation: Wind’s kinetic energy is converted to electrical energy.
Question 11
LEDs save energy because light is produced by:
  • Ion fission
  • Electron-hole recombination
  • Plasma conduction
  • Thermal radiation
Explanation: LEDs emit light efficiently via electron-hole recombination.
Question 12
The major storage lipid in animals is:
  • Steroid
  • Triglyceride
  • Glycogen
  • Wax
Explanation: Triglycerides store energy in animals.
Question 13
The most responsible pollutant for photochemical smog is:
  • Ozone
  • Carbon monoxide
  • Nitrogen oxides
  • Sulfates
Explanation: NOx plays a key role in smog formation.
Question 14
Acid rain primarily results from emissions of:
  • O₂ and N₂
  • SO₂ and NOx
  • CH₄ and NH₃
  • CFCs only
Explanation: Sulfur and nitrogen oxides form acids in rain.
Question 15
A major global impact of particulate matter (PM2.5) is:
  • Respiratory illness
  • Radioactive decay
  • Soil alkalinity
  • Ocean desalination
Explanation: Fine particles harm the lungs and health.
Question 16
Heavy metal contamination (e.g., mercury) is most harmful because it:
  • Evaporates quickly
  • Biomagnifies in food chains
  • Neutralizes nutrients
  • Decomposes rapidly
Explanation: It accumulates and increases up the food chain.
Question 17
Fiber optic cables support high bandwidth communication because data travels as:
  • Magnetic pulses
  • Electric currents
  • Light signals with minimal attenuation
  • Sound waves
Explanation: Light signals enable fast, low-loss transmission.
Question 18
Remote sensing is primarily used in environmental studies to:
  • Collect large-scale Earth surface data
  • Measure soil pH directly
  • Increase crop yield
  • Measure atomic mass
Explanation: It gathers large-scale environmental data from satellites.
Question 19
A Decision Support System (DSS) differs from routine MIS primarily by providing:
  • Predictive and unstructured problem-solving
  • Real-time broadcasting
  • Hardware configuration guidelines
  • Only transactional storage
Explanation: DSS supports complex decision-making and prediction.
Question 20
Satellite communication signals suffer from significant latency mainly due to:
  • Low transmission frequency
  • High antenna sensitivity
  • Heavy network encryption
  • Long propagation distance to orbit
Explanation: Signals travel long distances to satellites, causing delay.