Introduction to Modern Science & Tech in Exams
Questions in Science & Technology have shifted drastically from school-level definitions to real-world applications, emerging breakthroughs, and government technology missions.
Here is an essential summary of high-probability topics for your upcoming competitive tests.
1. Biotechnology & Gene Editing
CRISPR-Cas9 Technology
- What is it? A revolutionary molecular scissor allowing scientists to precisely cut and edit DNA sequences in living organisms.
- Key Components:
- Cas9: The enzyme that acts as molecular shears to cut the DNA strand.
- Guide RNA (gRNA): A synthetic RNA sequence designed to guide the Cas9 protein to the exact target site.
- Applications: Sickle cell anemia therapy, pest-resistant crop engineering, and hereditary disorder corrections.
mRNA Vaccines vs. Traditional Vaccines
- Traditional Vaccines: Introduce weakened or inactivated antigens to stimulate antibodies.
- mRNA Vaccines: Teach our cells how to make a protein (such as the viral spike protein) that triggers an immune response without introducing live pathogens.
2. Quantum Technology & Computing
India launched the National Quantum Mission (NQM) with an outlay of over ₹6,000 Crore to foster research and commercialization.
- Qubit (Quantum Bit): Unlike classical bits that are either $0$ or $1$, qubits can exist in a state of Superposition (both states simultaneously).
- Quantum Entanglement: A phenomenon where two particles remain intimately connected such that the state of one instantaneously influences the other, regardless of distance.
- Strategic Impact: Ultra-secure Quantum Key Distribution (QKD) communication immune to interception.
3. Defense Technology Innovations
- Hypersonic Glide Vehicles (HGV): Travel at speeds greater than Mach 5 while maneuvering unpredictably within the upper atmosphere, making traditional missile defense tracking obsolete.
- Air Independent Propulsion (AIP) Systems: Fitted on conventional diesel-electric submarines to allow them to stay submerged for weeks without surfacing to recharge batteries.
