SCIENCE
GS
Paper III: Science and Technology- developments and their applications and
effects in everyday life; Achievements of Indians in science & technology;
Indigenization of technology and developing new technology. & GS Paper II:
Issues relating to development and management of Social Sector/Services
relating to Health.
Hope for pancreatic cancer as new
drug shows promise
Analysis: The KRAS Mutation &
Daraxonrasib Breakthrough
1. The Biological Context: Cancer and KRAS
·
Mechanism of
Cancer: Cancer is
characterized by unregulated
cell division due to the failure of programmed cell death (apoptosis) and
repair mechanisms.
·
The KRAS
Gene: Acts as a
biological “molecular
switch.”
o Normal Function: Toggles between “on” (promotes division) and
“off” (suppresses division).
o The Mutation:
In ~95% of pancreatic cancers, KRAS is locked in the “on” state,
leading to continuous, malignant growth.
·
The
“Undruggable” Challenge: For decades, KRAS was deemed “undruggable” because its
protein surface is smooth and lacks the deep “pockets” required for
traditional small-molecule drugs to bind and inhibit activity.
2. Technological Breakthrough: Daraxonrasib
·
Mechanism of
Action: Developed
by Revolution Medicines, this molecule uses a “molecular chaperone” strategy.
o It binds to a protein called cyclophilin-A.
o This complex then locks onto KRAS
(in its “on” state), rendering it non-functional.
·
Broad
Spectrum Potential: Unlike
previous attempts that targeted specific mutations, daraxonrasib inhibits
multiple RAS variants, making it potentially effective for lung and colorectal
cancers in addition to pancreatic cancer.
3. Clinical Significance and Results
·
Pancreatic
Cancer Impact: Known for
late detection and resistance to surgery/chemotherapy.
·
Efficacy
Data:
o 97% Disease Control Rate: Patients showed either tumor
shrinkage or stability.
o 51% Objective Response: Actual reduction in tumor size.
·
Safety
Profile: While side
effects (rash, nausea) are common, they are non-life-threatening, which is critical for
advanced-stage cancer treatments.
4. Policy and Regulatory Landscape
·
FDA
“National Priority Voucher” Status: A new designation for drugs addressing
urgent health needs. It accelerates the review process from one year to 1–2 months.
·
Expanded
Access: Often
called “compassionate use,” allowing patients with no other options
to access the drug before final formal approval.
Significance for India
·
Health
Burden: Pancreatic
and lung cancers are rising in India. Breakthroughs in targeted therapy reduce
the reliance on aggressive, systemic chemotherapy.
·
Ethics and
Access: For UPSC,
consider the accessibility
and affordability of such “National Priority” drugs for the
Indian population once they transition from global trials to the Indian market.
Conclusion
The shift
from KRAS being “undruggable” to having a “game-changer”
molecule like daraxonrasib represents a paradigm shift in Precision Medicine. It moves
cancer treatment from broad-spectrum “poisoning” of cells (chemo) to
specific “molecular locking” of faulty genetic switches.
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FAQ
GS
Paper III: Science and Technology- developments and their applications and
effects in everyday life; Awareness in the fields of IT, Space, and Computers.
& GS Paper II: Government policies and interventions for development in
various sectors (Space Policy/Digital India).
What
is India’s first
orbital data centre satellite?
Analysis: India’s First Orbital
Data Centre (Pathfinder)
1. The Concept: Orbital Data Centre (ODC)
·
Definition: A satellite constellation
carrying high-end GPUs (Graphics Processing Units) capable of performing
on-orbit computation, including training and running AI models.
·
Shift in
Architecture: It moves
from “Relay and
Process” (sending raw data to Earth) to “Process and Relay” (processing data in
space and sending only insights).
·
Space-Based
Edge Computing: Similar to
terrestrial edge computing, it brings computation closer to the data source
(satellites/sensors) to reduce latency and bandwidth bottlenecks.
2. The Pixxel-Sarvam Partnership
·
Entities: Pixxel (Space-tech/Imaging) and
Sarvam (AI software).
·
The Mission: Pathfinder, a 200 kg-class satellite (scheduled for
Q4 2026).
·
Integrated
Payload: Combines
Pixxel’s Hyperspectral
Imaging cameras with Sarvam’s AI Full-stack models.
·
Utility: Real-time analysis of
hyperspectral data in orbit, transmitting only final conclusions to Earth,
thereby optimizing downlink costs and speed.
3. Drivers
for Orbital Computation
·
Resource
Constraints on Earth: Terrestrial
data centres face limits on land, water (for cooling), and energy.
·
Abundant
Energy: In specific
orbits, solar power is nearly continuous and “free,” offering a
massive power source for energy-hungry AI training.
·
Data
Bottlenecks: Modern
satellites generate massive files. Processing these in space avoids the
expensive and slow process of “downlinking” raw data.
·
Geopolitical
& Commercial Competition: Major players like SpaceX (Starlink V3), Blue Origin, and
Microsoft are racing to establish space-based compute infrastructure.
4. Critical Challenges (The “Space Environment”
Barrier)
·
Thermal
Management: * The Vacuum Problem: In
space, heat cannot be removed via convection (no air/fans).
o The Solution: Heat must be moved through
ammonia-filled loops and dissipated via radiation as infrared light, which is technologically
complex.
·
Radiation
Vulnerability: * Cosmic
rays cause “Bit
Flips” (data corruption) and degrade semiconductors.
o Current radiation-hardened chips
are significantly slower than commercial-grade GPUs.
·
Maintenance
& Redundancy: Unlike
terrestrial servers, hardware in orbit cannot be manually repaired. High
redundancy and future robotic servicing are essential.
Significance for India (UPSC
Perspective)
·
Strategic
Autonomy: Developing
indigenous “Space-AI” capabilities reduces reliance on foreign cloud
infrastructure for sensitive hyperspectral/defense data.
·
New Space
Policy 2023: This
project aligns with India’s push for private sector participation (NewSpace
India Limited/IN-SPACe) in high-end space technology.
·
Technological
Leap: If
successful, Pixxel-Sarvam could set a global precedent for using
commercial-grade hardware in the harsh Low Earth Orbit (LEO) environment.
Conclusion
The Pathfinder mission represents the
convergence of AI and Space 2.0.
While the thermal and radiation hurdles are steep, the transition from
Earth-bound data centres to “orbital compute” could redefine global
data processing, making India a frontrunner in the next frontier of the digital
economy.
FAQ
GS
Paper II (Governance, Constitution, Polity, and Inter-State Relations)
What is the Governor’s role in a hung Assembly?
Analysis: Role of the Governor in
a Hung Assembly
The deadlock in Tamil Nadu
following the 2026 elections highlights the friction between the Governor’s discretionary powers
and established constitutional
conventions. While the Governor (Article 164) appoints the Chief Minister,
the absence of a clear majority necessitates a balance between administrative
sobriety and the prevention of “horse-trading.”
1. Order
of Preference for Forming Government
Based on the
Sarkaria Commission and
Supreme Court endorsements, the Governor should follow a specific hierarchy to
ensure stability:
·
Pre-poll
Alliance: The group
that contested together and secured the most seats.
·
Single
Largest Party (SLP): If no
pre-poll alliance has a majority, the SLP with staked support.
·
Post-poll
Alliance: A coalition
formed after results to achieve the “golden majority.”
·
President’s
Rule (Article 356): Used only
as a last resort if all
attempts to form a stable government fail.
2. The
Floor Test vs. Gubernatorial Discretion
·
The Bommai
Precedent (1994): Established
that the Floor of the House
is the only objective way to test a majority, moving away from the
“subjective satisfaction” of the Governor.
·
Physical
Verification Controversy:
The demand for physical letters of support (as seen in the TVK case) is often
criticized as a delay tactic. Current jurisprudence suggests the Governor
should swear in the claimant and mandate a speedy floor test (often within 24–48 hours) to
prevent political maneuvering.
·
Judicial
Interventions: Cases in
Goa (2017) and Karnataka (2018) demonstrate that the Supreme Court frequently
curtails the “reasonable time” given by Governors to ensure the
mandate isn’t subverted.
3. Key
Constitutional & Legal Anchors
|
Feature |
Reference |
|
Appointment Power |
Article 164 of the
Constitution. |
|
Dissolution Power |
Article 174(2)(b) (can be
used even before the first meeting to prevent breakdown). |
|
Stability Guidance |
Sarkaria Commission & M.M. Punchhi Commission. |
|
Judicial Oversight |
Rameshwar Prasad (2006) & S.R. Bommai (1994). |
4.
Critical Takeaway for UPSC
The core
conflict lies in the Governor’s role as a “Constitutional Sentinel.” While the
Governor must ensure a stable government, their actions must not infringe upon
democratic mandates. The evolution of “Floor Tests” as a mandatory
transparent process serves as a safeguard against the politicization of the Raj Bhavan (or Lok Bhavan).
__________________________________________________________________________________
FAQ
GS Paper III (Science and Technology:
Developments and their Applications; Issues Relating to Health)
Why is hantavirus drawing global attention?
Analysis: Hantavirus Outbreak and
Zoonotic Risks
1. Nature
and Origin
·
Pathogen: Hantaviruses are a family of
viruses primarily hosted by rodents
(rats, mice).
·
Transmission: * Primary: Zoonotic transmission via contact with
infected rodent urine, saliva, or droppings. Inhalation of aerosolized virus
particles is a common route.
o Secondary:
Generally, human-to-human transmission is rare. However, the Andes strain (involved
in the MV Hondius outbreak) is a notable exception, capable of spreading
between close human contacts.
2.
Clinical Profile and Challenges
·
Diseases
Caused:
1.
Hantavirus
Pulmonary Syndrome (HPS):
Severe respiratory illness.
2.
Haemorrhagic
Fever with Renal Syndrome (HFRS): Affects kidneys and blood vessels.
·
Symptoms: Flu-like onset (fever, fatigue)
progressing to severe respiratory distress, pneumonia, and fluid build-up in
the lungs.
·
Diagnostic
Difficulty: Overlaps
with influenza, COVID-19, and dengue, often leading to delayed medical
intervention.
·
Treatment: No specific antiviral cure or
vaccine exists. Management is restricted to supportive care (oxygen therapy, fluid management,
mechanical ventilation).
3. Public
Health Concern & Global Impact
·
Zoonotic
Spread: The
outbreak highlights the increasing threat of zoonotic diseases in an era of
high-density global travel and human-animal interaction.
·
Pandemic
Potential: Low. Unlike
SARS-CoV-2, Hantavirus is not highly transmissible among humans. The risk is
primarily localized to those in rodent-prone environments (farmers,
construction workers, etc.).
·
The
“Travel” Factor:
The MV Hondius case underscores the risk of “silent spreaders” across
borders when symptoms appear weeks after exposure (incubation period: 1–8
weeks).
4. Way
Forward for Health Policy
To align
with UPSC’s focus on institutional responses, the following measures are
essential:
·
One Health
Approach: Integrating
human, animal, and environmental health to manage rodent-borne threats.
·
Surveillance
& Reporting:
Strengthening international coordination (as per WHO guidelines) for quicker
identification of cases among travelers.
·
Sanitation
Standards: Strict
rodent control and sanitation protocols in the hospitality and travel
industries (e.g., cruise ships).
Summary for Aspirants: Hantavirus represents a zoonotic challenge rather than a
pandemic threat. Focus on the Andes
strain’s unique human-to-human transmission capability and the lack of a
specific vaccine as key points for Science & Technology or Disaster
Management answers. ________________________________________________________________