Science – Hard Level – GK Questions

Higgs field interacts with particles via Higgs mechanism, endowing them with mass. Discovery confirmed Standard Model prediction. Nobel Prize in Physics 2013. [[NCERT Physics Class 12]]

Digital twins simulate, predict, and optimize performance of assets (engines, cities, power grids). Enabled by IoT, AI, cloud computing. Emerging application in Industry 4.0 and smart infrastructure. [[NITI Aayog Reports]]

Recombineering uses phage proteins for homologous recombination in vivo, enabling large DNA insertions/deletions. Complements CRISPR for complex genome engineering in synthetic biology. [[DBT Reports, NCERT Biology Class 12]]

DFT calculates electronic structure (energy, orbitals) of atoms, molecules, solids using electron density instead of wavefunctions. Widely used in materials design, catalysis, drug discovery. [[NCERT Chemistry Class 12]]

Superconductors exhibit zero DC resistance and Meissner effect (expelling magnetic fields). Applications: MRI magnets, maglev trains, quantum computing. High-Tc superconductors operate above liquid nitrogen temps. [[NCERT Physics Class 12]]

Edge computing reduces latency and bandwidth by processing data at/near IoT devices (sensors, phones). Critical for real-time applications: autonomous vehicles, industrial automation. [[MeitY Reports]]

Beta-lactam ring (4-membered cyclic amide) inhibits bacterial cell wall synthesis. Resistance via beta-lactamase enzymes. Core structure for penicillins, cephalosporins, carbapenems. [[NCERT Chemistry Class 12]]

CpG islands (CG dinucleotides) are common methylation sites. Methyl groups added to cytosine by DNMT enzymes silence genes. Epigenetic changes influence development, disease, and inheritance. [[NCERT Biology Class 12]]

Supramolecular chemistry studies molecular assemblies via hydrogen bonds, van der Waals, π-π interactions. Applications: drug delivery, sensors, molecular machines (Nobel 2016). [[NCERT Chemistry Class 12]]

Graphene's 2D honeycomb lattice gives exceptional strength, conductivity, and flexibility. Applications: flexible electronics, composites, sensors. Nobel Prize in Physics 2010. [[NCERT Chemistry Class 11, DST Reports]]

Dopamine in mesolimbic pathway mediates reward, motivation, addiction. Imbalances linked to Parkinson's (deficit) and schizophrenia (excess). Critical for understanding brain function. [[NCERT Biology Class 11]]

Aditya-L1 orbits Sun-Earth L1 point (~1.5 million km from Earth), providing uninterrupted solar observation. Studies corona, solar winds, and space weather impacts. [[ISRO Reports, NCERT Geography Class 11]]

iPSCs (Yamanaka, 2006) are generated by introducing transcription factors (Oct4, Sox2, Klf4, c-Myc) into adult cells. Avoid ethical issues of embryonic stem cells; used in regenerative medicine. [[DBT Reports, NCERT Biology Class 12]]

ACE inhibitors (e.g., Enalapril, Lisinopril) block conversion of angiotensin I to II, lowering blood pressure. First-line treatment for hypertension and heart failure. [[NCERT Biology Class 11, MoHFW Guidelines]]

Quantum dots (semiconductor nanocrystals) emit different colors based on size: smaller dots emit blue, larger emit red. Used in displays, bioimaging, solar cells. [[NCERT Physics Class 12, DST Reports]]

NMR (Nuclear Magnetic Resonance) exploits nuclear spin in magnetic fields; radiofrequency pulses induce resonance. Used for molecular structure determination in chemistry and medicine (MRI). [[NCERT Chemistry Class 12]]

Article 6 enables countries to cooperate via carbon markets (trading emission reductions) and non-market approaches to achieve NDCs. Critical for global climate mitigation. [[UNFCCC, MoEFCC Reports]]

RNAi uses siRNA/miRNA to degrade or block translation of specific mRNA, regulating genes. Applied in pest-resistant crops (e.g., RNAi cotton) and therapeutic research. [[NCERT Biology Class 12, DBT Reports]]

Ostwald process: catalytic oxidation of NH₃ to NO, then to NO₂, absorbed in water to form HNO₃. Critical for fertilizers, explosives, and chemical synthesis. [[NCERT Chemistry Class 12]]

mAbs are homogeneous antibodies targeting a single epitope, produced via hybridoma technology. Used in cancer therapy (e.g., Trastuzumab), diagnostics, and autoimmune diseases. [[NCERT Biology Class 12, ICMR Reports]]