Science – Hard Level – GK Questions

XAI addresses 'black box' problem in complex models (deep learning) by providing human-understandable explanations for decisions. Critical for high-stakes domains: healthcare diagnostics, credit scoring, judicial support. [[NITI Aayog Principles for Responsible AI]]

Venter Institute (2010) synthesized Mycoplasma mycoides genome (~1.08 Mbp), transplanted into M. capricolum, creating first self-replicating synthetic cell. Milestone in synthetic biology with biosecurity implications. [[DBT Reports, NCERT Biology Class 12]]

Immobilized enzymes combine biocatalyst specificity with heterogeneous catalyst recoverability. Used in pharmaceutical synthesis, biofuel production, biosensors. Aligns with green chemistry principles. [[NCERT Chemistry Class 12]]

Metamaterials have sub-wavelength structures designed to manipulate EM waves in ways natural materials cannot. Applications: superlenses, cloaking, compact antennas. Active research area in photonics and acoustics. [[NCERT Physics Class 12, DST Reports]]

Attribution science quantifies how climate change altered likelihood/intensity of events (heatwaves, floods). Informs loss/damage discussions, adaptation planning. Indian institutions (IITM, NCMRWF) contribute to regional attribution. [[MoES Reports]]

Gene drives could spread malaria-resistance genes or suppress Anopheles populations. High potential but raises ecological/ethical concerns. Strict biosafety protocols under DBT guidelines govern research in India. [[DBT Reports, NCERT Biology Class 12]]

ITER (France) uses D-T fusion: D + T → He + n + 17.6 MeV. Requires plasma at 150 million °C confined by magnetic fields (tokamak). Success would pave way for commercial fusion power. India contributes critical components. [[DST Reports, NCERT Physics Class 12]]

6G (2030+) aims for convergence of communication, sensing, computing, and AI: holographic telepresence, tactile internet, ubiquitous intelligence. Requires breakthroughs in THz tech, materials, energy efficiency. [[TRAI, MeitY Reports]]

CAR-T cells recognize cancer cell surface markers (e.g., CD19 in B-cell malignancies), triggering targeted destruction. Personalized immunotherapy with high response rates in refractory cancers. Approved for certain leukemias/lymphomas. [[ICMR Reports, NCERT Biology Class 12]]

LNPs fuse with cell membranes or are internalized via endocytosis; endosomal escape releases mRNA into cytoplasm for translation. Key innovation enabling mRNA vaccine efficacy and stability. [[ICMR Reports, NCERT Biology Class 12]]

Cesium-133 hyperfine transition (9,192,631,770 Hz) defines the SI second. Atomic clocks enable GPS positioning accuracy (~5-10 m). Next-gen optical clocks (Sr, Yb) promise 100x improvement. [[NCERT Physics Class 11, ISRO Reports]]

EEG places electrodes on scalp to detect electrical activity from neuronal populations. Portable, low-cost, real-time; used in neurofeedback, prosthetics control, communication aids for locked-in patients. [[NCERT Biology Class 11, DBT Reports]]

Memristors (memory resistors) emulate synaptic plasticity, enabling low-power, parallel processing for AI tasks. Applications: edge AI, robotics, brain-machine interfaces. India's National Mission on Interdisciplinary Cyber-Physical Systems supports R&D. [[MeitY, DST Reports]]

DAC uses chemical sorbents to capture CO₂ from atmosphere (~400 ppm), enabling negative emissions. Energy-intensive but crucial for hard-to-abate sectors. India's National Carbon Capture Program supports R&D. [[MoEFCC, DST Reports]]

ctDNA fragments released by tumors into bloodstream carry tumor-specific mutations. Liquid biopsy enables non-invasive cancer detection, monitoring treatment response, and identifying resistance mechanisms. Emerging tool in precision oncology. [[ICMR Reports, NCERT Biology Class 12]]

Organoids derived from pluripotent or adult stem cells self-organize into tissue-like structures. Used for disease modeling (e.g., brain, gut, liver), drug screening, and personalized medicine. Ethical alternative to animal testing. [[DBT Reports, NCERT Biology Class 12]]

AlphaFold predicts 3D protein structures from amino acid sequences with atomic accuracy, revolutionizing structural biology. Critical for rational drug design, understanding disease mechanisms, and enzyme engineering. [[DBT Reports, NCERT Biology Class 12]]

INO (proposed in Theni, Tamil Nadu) will house a 50-kton ICAL detector to study neutrino mass hierarchy and oscillation parameters. Neutrinos are elusive particles that can reveal fundamental physics beyond the Standard Model. [[DST Reports, NCERT Physics Class 12]]

LIGO (Laser Interferometer Gravitational-Wave Observatory) made the first direct detection of gravitational waves in 2015 (announced 2016), confirming Einstein's 1916 prediction. Waves originated from merging black holes 1.3 billion light-years away. Nobel Prize in Physics 2017. [[NCERT Physics Class 11, IUCAA Reports]]

WOAH (World Organisation for Animal Health, formerly OIE) co-leads the Quadripartite One Health partnership with FAO, UNEP, WHO. Addresses zoonoses, antimicrobial resistance, food safety at human-animal-environment interface. [[WHO, MoHFW Reports]]