Science & Technology
🟢 Lite — Quick Review
Science and Technology in the MAT examination draws from Indian achievements in space and missile programmes, information technology, and general science awareness. The examination typically tests knowledge of recent missions, important discoveries, Nobel Prize winners, and government technology initiatives. Given the rapid pace of technological change, questions focus on major milestones and established programmes rather than transient developments.
Key facts to memorise:
- ISRO: Chandrayaan-3 (August 2023, soft-landed near lunar south pole — India became fourth country and first to land near the south pole); Aditya-L1 (September 2023, India’s first solar mission, placed at L1 Lagrange point); Mars Orbiter Mission/Mangalyaan (2013, entered Mars orbit 24 September 2014 — first country to succeed on first attempt, cost ₹450 crore); Gaganyaan (human spaceflight programme, targeting uncrewed flight 2025)
- Missiles: Prithvi (short-range, 150–300 km, battlefield tactical missile); Agni-I (700–1,200 km); Agni-II (2,000–2,500 km); Agni-III (3,000–4,000 km); Agni-IV (3,000–4,000 km, canisterised); Agni-V (5,000–8,000 km, intercontinental, MIRV capable); BrahMos (supersonic cruise missile, Mach 2.8, 290 km range, joint venture with Russia)
- DRDO: Established 1958; developed India’s missile programme, radars, electronic warfare systems
- IT: Bangalore (“Silicon Valley of India”), Hyderabad, Pune, Chennai as major IT hubs; UPI (Unified Payments Interface) as globally recognised real-time payment system
- Nobel Prizes (recent): 2024 Chemistry (David Baker, Dennis Caswell, Demis Hassabis — protein structure prediction); 2024 Medicine (microRNA discovery by Ambros and Ruvkun); 2023 Physics (Attosecond physics — Agostini, Krausz, L’Huillier); 2023 Chemistry (Quantum dots — Bawendi, Brus, Ekimov)
⚡ MAT Exam Tip: For space missions, learn the year and key achievement simultaneously — “Mangalyaan (2013) — first country to succeed on first Mars attempt.” For missiles, remember the range progression: Prithvi is shortest, BrahMos is supersonic cruise, Agni-V is intercontinental. For Nobel Prizes, focus on the previous two years’ winners and the field — Physics, Chemistry, Medicine are tested most.
🟡 Standard — Regular Study
Indian Space Programme — ISRO
Organisational Structure:
The Department of Space (DoS), under the Prime Minister’s overall charge, directs India’s space programme through its primary implementation arm, ISRO (Indian Space Research Organisation). The Chairman of ISRO serves as the Secretary of the Department of Space and is appointed by the Government of India. S. Somanath has been Chairman since January 2022.
ISRO’s headquarters is in Bengaluru. Major centres include the Vikram Sarabhai Space Centre (VSSC, Thiruvananthapuram — launch vehicle development), U.R. Rao Satellite Centre (Bengaluru — satellite design and development), Satish Dhawan Space Centre (SDSC-SHAR, Sriharikota — launch pad operations), ISRO Telemetry Tracking and Command Network (ISTRAC, Bengaluru — mission operations), and the Human Spaceflight Centre (Bengaluru — for Gaganyaan programme).
Satellite Constellations:
IRS (Indian Remote Sensing) satellites: India’s largest civilian earth observation constellation, providing data for agriculture, water resources, urban planning, and disaster management. The Cartosat series provides high-resolution imagery (0.25-metre resolution) for mapping and infrastructure monitoring. RISAT (Radar Imaging Satellite) uses synthetic aperture radar capable of imaging through clouds and darkness.
INSAT (Indian National Satellite System): Multi-purpose geostationary satellites for communication, broadcasting (DD National, private channels), weather forecasting (INSAT-3D), and search and rescue operations. INSAT series operates from geostationary orbit (35,786 km above the equator).
GSAT (Geosynchronous Satellite): Communication satellites, some built with foreign cooperation; GSAT-11 (2018) was India’s heaviest communication satellite at 5,854 kg.
Key ISRO Missions:
Chandrayaan-1 (2008): India’s first lunar probe; 11 scientific instruments; operated for 312 days before losing contact. However, it made the landmark discovery of water molecules (hydroxyl radical signature) on the lunar surface through the Moon Mineralogy Mapper (M3) instrument — confirmed by later Chandrayaan-3 findings. The mission cost approximately ₹386 crore.
Chandrayaan-2 (2019): India’s most complex mission until Chandrayaan-3; comprised an orbiter (functional, continues relaying data), lander Vikram, and rover Pragyan. The lander crashed during descent on 6 September 2019 due to a software error that caused incorrect attitude commands — the orbiter remains operational and continues mapping the moon from orbit.
Chandrayaan-3 (2023): India’s successful soft-landing mission; launched 14 July 2023; soft-landed on 23 August 2023 near the lunar south pole (69.37°S latitude). Vikram lander and Pragyan rover confirmed the presence of oxygen, sulphur, iron, calcium, aluminium, manganese, chromium, titanium, and water ice on the lunar surface. India became the fourth country to soft-land on the moon (after USSR/Russia, USA, China) and the first to land near the lunar south pole. The mission cost approximately ₹615 crore.
Mars Orbiter Mission (Mangalyaan, 2013): Launched on 5 October 2013 using the PSLV-C25 rocket; entered Mars orbit on 24 September 2014. India became the first Asian country to reach Mars orbit and the first country in the world to succeed on its first attempt. The mission cost approximately ₹450 crore (approximately $74 million) — cheaper than the budget of the Hollywood film Gravity — and produced remarkable science, including discovery of superhot plasma eruptions from the Martian atmosphere.
Aditya-L1 (2023): India’s first solar mission; launched on 2 September 2023; placed at Lagrange Point 1 (L1), approximately 1.5 million km from Earth, on 6 January 2024. From L1, the spacecraft can observe the Sun continuously without occultation. Seven payloads study the solar corona (Coronal Mass Ejections), solar wind, solar flares, and the photosphere.
Gaganyaan Programme: India’s human spaceflight programme targeting an Indian astronaut (Gagannaut) in space by 2025. The programme involves the development of the Gaganyaan orbital spacecraft,HLM (Human Rated Launch Vehicle based on GSLV Mk III), and life support systems. Four candidate astronauts (Indian Air Force officers) have been training; uncrewed test flights are planned before the crewed mission.
Launch Vehicles:
- PSLV (Polar Satellite Launch Vehicle): India’s most reliable launch vehicle (94% success rate); used for Chandrayaan-1, Mangalyaan, multi-satellite missions; 4-stage rocket using solid and liquid propulsion; nicknamed the “workhorse” for its versatility
- GSLV Mk III (Geosynchronous Satellite Launch Vehicle): Heavy-lift vehicle for communication satellites; used for Chandrayaan-2 and Chandrayaan-3 launches; renamed LVM3 (Launch Vehicle Mark 3)
- SSLV (Small Satellite Launch Vehicle): New vehicle designed for the small satellite market; can place 500 kg payload in 500 km Low Earth Orbit; offers rapid turnaround (within days rather than weeks)
Missile and Defence Technology
Integrated Guided Missile Development Programme (IGMDP):
Launched in 1983 under the leadership of Dr. A.P.J. Abdul Kalam, the IGMDP aimed to achieve self-reliance in missile technology. It successfully developed five missile systems: Prithvi, Agni, Trishul, Nag, and Akash.
Surface-to-Surface Missiles:
Prithvi: Short-range battlefield tactical missile; ranges from 150 km (Prithvi-I, army version) to 300 km (Prithvi-II, air force version); liquid fuel; can be launched from mobile transporter erector launchers; accuracy within 150 metres.
Agni-I: Short-range ballistic missile; 700–1,200 km range; solid fuel; road-mobile; can be launched from launcher within minutes; designed for tactical use against enemy territory close to borders.
Agni-II: Medium-range; 2,000–2,500 km; two-stage solid propulsion; nuclear capable; inducted into Indian Army in 2011.
Agni-III: Intermediate-range; 3,000–4,000 km; submarine-launched variant (K-4) also developed for INS Arihant-class submarines.
Agni-IV: 3,000–4,000 km; improved accuracy through ring laser gyro-based inertial navigation; canisterised for storage and launch from underground silos or road vehicles; entered service in 2018.
Agni-V: Intercontinental ballistic missile; 5,000–8,000 km range; three-stage solid propulsion; canisterised; enables reaching targets across Asia-Pacific including Beijing and Shanghai; MIRV (Multiple Independently Targetable Reentry Vehicle) capability — can carry multiple warheads aimed at different targets.
Cruise Missiles:
BrahMos: Supersonic cruise missile (Mach 2.8, nearly three times the speed of sound); range 290 km (extended to 400+ km after India withdrew from the MTCR — Missile Technology Control Regime in 2016). Jointly developed with Russia (NPOM/NPO Mashinostroyeniya); can be launched from land (BrahMos-S), sea (BrahMos-A from warships), submarine (BrahMos-P), and aircraft (BrahMos-N). India is the only country currently operating a supersonic cruise missile in this class.
- Nirbhay:* Subsonic cruise missile; range 1,000 km; terrain-hugging flight; GPS/INS navigation; nuclear capable; successfully test-fired with indigenous SeG应该有 (systems) in 2024.
Anti-Tank Missiles:
Nag: Third-generation fire-and-forget anti-tank missile; uses an infrared imaging seeker; can penetrate reactive armour; inducted into Indian Army in 2020. Helina: Air-launched version of Nag; to be fired from Dhruv Rudra and Light Combat Helicopters.
Information Technology and Digital Infrastructure
India’s IT Story:
India’s IT sector grew from a $2 billion industry in 1990 to approximately $250 billion in exports by 2023, employing over 5 million people directly and 15 million indirectly. Bangalore (officially renamed Bengaluru) is the epicentre — home to major Indian IT companies (Infosys, Wipro, TCS) and global tech multinationals (Google, Microsoft, Amazon, Meta have major R&D centres there). Hyderabad hosts Microsoft’s largest campus outside the US and major operations of Amazon and Apple. Pune and Chennai are emerging technology hubs.
UPI (Unified Payments Interface):
Launched in 2016 by the National Payments Corporation of India (NPCI), UPI has become India’s most successful digital payment infrastructure. By 2024, UPI processes over 10 billion transactions monthly, with a total value exceeding ₹15 lakh crore. The system enables instant money transfers between bank accounts using a Virtual Payment Address (VPA) or QR code, operating 24x7 with no holidays. UPI has been adopted internationally — launched in Singapore, UAE, Mauritius, Bhutan, Nepal, and Sri Lanka.
Aadhaar:
The Unique Identification Authority of India (UIDAI) has enrolled over 1.4 billion residents (as of 2024) — virtually the entire Indian population. Aadhaar is the world’s largest biometric identification system, using 10 fingerprints, iris scans, and demographic data. It serves as the foundation for Direct Benefit Transfers (DBT), eliminating ghost beneficiaries and saving the government over ₹2 lakh crore in leakages since 2014. However, Aadhaar has faced criticism for privacy concerns and has been challenged in the Supreme Court (Justice K.S. Puttaswamy vs Union of India, 2017 — upheld as constitutional with safeguards).
Start-up Ecosystem:
India has over 1.5 lakh registered start-ups across 55 departments, with 110+ unicorns (startups valued at $1 billion or more). Major sectors include e-commerce (Flipkart, Swiggy, Zomato), fintech (PhonePe, Razorpay, CRED), edtech (Byju’s — though currently facing financial difficulties), healthtech (Practo, PharmEasy), and software services.
Nobel Prize Winners in Science (Recent)
Physics:
- 2024: Nobel Prize in Physics awarded for foundational discoveries that have generated enormous benefits for humanity (this was hypothetical — the actual 2024 prize went to the developers of machine learning/neural networks: John Hopfield and Geoffrey Hinton)
- 2023: Pierre Agostini, Ferenc Krausz, Anne L’Huillier — Attosecond physics (ultra-short laser pulses that capture electron motions)
- 2022: Alain Aspect, John F. Clauser, Anton Zeilinger — Quantum entanglement experiments and Bell inequality violation (proving Einstein was wrong about “spooky action at a distance”)
Chemistry:
- 2024: David Baker (computational protein design), Dennis Caswell (X-rayroot), Demis Hassabis (AlphaFold — AI for protein structure prediction)
- 2023: Moungi Bawendi, Louis Brus, Alexei Ekimov — Discovery and synthesis of quantum dots (semiconductor nanocrystals revolutionising display technology and medical imaging)
- 2022: Carolyn Bertozzi, Karl Barry Sharpless, Morten Meldal — Click chemistry and bioorthogonal chemistry (reactions that “click” molecules together, used in pharmaceuticals, DNA mapping, materials science)
Physiology or Medicine:
- 2024: Victor Ambros and Gary Ruvkun — Discovery of microRNA (a fundamental regulatory mechanism in gene expression)
- 2023: Katalin Karikó and Drew Weissman — Nucleoside base modifications enabling mRNA vaccines (the scientific foundation for Pfizer-BioNTech and Moderna COVID-19 vaccines)
- 2022: Svante Pääbo — Paleogenomics (sequencing the genome of Neanderthals and discovering Denisovans, revealing human evolution)
🔴 Extended — Deep Study
Physics Concepts Frequently Tested
Quantum Entanglement:
Quantum entanglement is a phenomenon where two particles become correlated such that measuring one instantly affects the other, regardless of distance. Einstein called it “spooky action at a distance.” The 2022 Nobel Prize in Physics honoured Bell inequality experiments by Alain Aspect, John Clauser, and Anton Zeilinger that confirmed entanglement is real and that local realism (Einstein’s view) is false. This has profound implications for quantum computing and quantum cryptography.
India’s quantum computing initiatives include the National Mission on Quantum Technologies (₹8,000 crore, launched 2023) aiming to develop quantum computers, quantum communication networks, and quantum sensors.
Gravitational Waves:
Gravitational waves — ripples in spacetime predicted by Einstein’s general relativity in 1916 — were first directly detected by LIGO (Laser Interferometer Gravitational-Wave Observatory) on 14 September 2015. The signal came from two black holes (36 and 29 solar masses) merging 1.3 billion light-years away. India’s participation in the LIGO project includes LIGO India (a planned gravitational wave observatory in Maharashtra, construction approved in 2020).
India’s Gravitational Wave Observatory (IndIGO) consortium has been working on a proposal for an Indian gravitational wave detector since 2011.
Semiconductors:
Semiconductors (computer chips) are critical to modern electronics. The global chip shortage of 2020–2022 exposed supply chain vulnerabilities. India launched the India Semiconductor Mission (₹76,000 crore) in 2021 to develop a domestic semiconductor ecosystem. Vedanta-Foxconn announced a ₹1.54 lakh crore investment for a semiconductor fab in Dholera, Gujarat (though the project has faced delays). CG Power is building an OSAT ( Outsourced Semiconductor Assembly and Test) facility in Sanand, Gujarat.
Biology Concepts
DNA Structure:
DNA (deoxyribonucleic acid) comprises two antiparallel strands forming a double helix. Each strand’s backbone consists of sugar (deoxyribose) and phosphate groups. The strands are connected by complementary base pairs: Adenine pairs with Thymine (two hydrogen bonds), Guanine pairs with Cytosine (three hydrogen bonds). The human genome contains approximately 3 billion base pairs, encoding approximately 20,000–25,000 protein-coding genes.
RNA and mRNA Vaccines:
RNA (ribonucleic acid) differs from DNA in having a hydroxyl group at the 2’ position of the sugar and using Uracil instead of Thymine. Messenger RNA (mRNA) carries genetic information from DNA in the nucleus to ribosomes in the cytoplasm for protein synthesis. mRNA vaccines (Pfizer-BioNTech and Moderna COVID-19 vaccines) deliver synthetic mRNA encoding the coronavirus spike protein; the body’s cells produce the protein, triggering an immune response. Katalin Karikó and Drew Weissman’s discovery of nucleoside base modifications (replacing uridine with pseudouridine) that prevent the mRNA from triggering excessive inflammatory responses was critical to making mRNA vaccines viable.
Antibiotics:
Alexander Fleming discovered penicillin in 1928 when a mould (Penicillium notatum) contaminated his bacterial culture and killed the surrounding bacteria. Antibiotics work through various mechanisms: penicillins and cephalosporins (beta-lactams) inhibit bacterial cell wall synthesis; tetracyclines and aminoglycosides inhibit protein synthesis; quinolones inhibit DNA replication.
Antimicrobial Resistance (AMR) — where bacteria evolve to resist antibiotics — is a growing global health threat. India’s CDSCO (Central Drugs Standard Control Organisation) has tightened antibiotic regulations, and the National Action Plan on AMR (2017) addresses this through surveillance, infection control, and antibiotic stewardship programmes.
Biotechnology
Gene Therapy and CRISPR:
Gene therapy aims to treat or cure diseases by modifying a person’s genetic material. CRISPR-Cas9 (Clustered Regularly Interspaced Short Palindromic Repeats) is a gene-editing tool derived from bacterial immune systems, adapted by Jennifer Doudna and Emmanuelle Charpentier (awarded the 2020 Nobel Prize in Chemistry). CRISPR allows precise editing of any gene — cutting DNA at specific locations and either disabling a gene or inserting new sequences.
India’s biotechnology sector (bioeconomy valued at $80 billion in 2023) includes biopharmaceuticals (vaccines, biologics), bioagriculture (Bt cotton — India’s only approved GM crop, contributing to India becoming the world’s largest cotton producer), bioindustrial applications, and bioinformatics. Major institutes include the Indian Institute of Science (IISc, Bengaluru), National Centre for Biological Sciences (NCBS), and the Department of Biotechnology (DBT).
Space Technology Developments
Gaganyaan Programme:
The Gaganyaan programme aims to demonstrate India’s human spaceflight capability by sending three astronauts to orbit for 3–5 days in low Earth orbit (400 km altitude). The orbital spacecraft will be launched on the HLGM-3 (Human-rated GSLV Mk III). The astronauts will conduct experiments in microgravity, and the mission will establish India’s capacity for independent human space travel.
Training of the four Indian Air Force pilots (Group Captain Prashanth Balakrishnan Nair, Colonel Ajit, Wing Commander Siva Kumar, and Flight Lieutenant Rakesh Sharma — the last named after India’s first cosmonaut) is underway at the Gagarin Cosmonaut Training Centre in Russia and ISRO’s Human Spaceflight Centre in Bengaluru.
Reusable Rockets:
ISRO is developing a Reusable Launch Vehicle (RLV) — a technology demonstration programme for future reusable rockets that could significantly reduce launch costs. The RLV-TD (Technology Demonstrator) has conducted multiple drop tests from a helicopter, testing landing technologies.
Key Government Science Schemes
- India AI Mission (2024): ₹10,372 crore allocated to establish computing infrastructure (AI compute supercomputer with 10,000+ GPUs), funding AI startups, developing indigenous Large Language Models, and ensuring safe and trusted AI development
- INSPIRE Awards: Attracts young talent (Class 6–10 students) to science through awards of ₹5,000–₹20,000 for innovative science projects
- CSIR (Council of Scientific and Industrial Research): 38 national laboratories covering aerospace, biology, chemicals, food, materials, and metals; notable contributions include developing India’s first civilian aircraft (HAL Tejas engine components), the breath analyser for police, and anti-leprosy vaccine
- National Research Foundation (NRF): Announced in 2020; to fund and coordinate research across universities and institutions; ₹50,000 crore over 5 years
MAT Exam Strategy for Science & Technology
Most frequently tested topics:
- ISRO missions and their years — questions like “Which Indian mission confirmed water ice on the Moon?” (Chandrayaan-1 via M3, confirmed by Chandrayaan-3)
- Missile ranges and types — Prithvi vs Agni vs BrahMos; confuse at your peril
- Nobel Prize winners (current and preceding year in Physics, Chemistry, Medicine)
- DRDO achievements in news
- UPI/Aadhaar as digital public infrastructure achievements
Common traps:
- Confusing PSLV and GSLV — PSLV launches polar-orbiting satellites (earth observation), GSLV launches geostationary satellites (communication)
- Mixing up Agnipath (military recruitment scheme, 2022) with any missile programme
- Attributing Mangalyaan’s success to the wrong year — launched 2013, entered Mars orbit 2014
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