Daily Current Affairs 2025  

CA-18/02/2026


Contents
1. H-125 Light Utility Helicopter
2. Bee Corridors
3. Nitric Oxide
4. Lepidocampa Sikkimensis
5. Tulbul Navigation Barrage Project
6. Khorramshahr-4 Missile
7. Loggerhead Turtle
8. Food Safety and Standards Authority of India (FSSAI)
9. India France Relation
 
 
H-125 Light Utility Helicopter
 
Why in News?
Prime Minister Narendra Modi and French President Emmanuel Macron virtually inaugurated the 
H125 Final Assembly Line (FAL)in Vemagal, Karnataka
 

Key Specifications & Performance
  • Private-Sector Milestone: This is the first time a private Indian company, Tata Advanced Systems Limited (TASL), will undertake full helicopter assembly, including integration, testing, and delivery.
  • "Made in India" Timeline: The first "Made in India" H125 helicopters are expected to roll out by early 2027.
  • Strategic Capacity: The facility aims to produce approximately 10 helicopters annually at first, with a projected output of 500 units over the next 20 years to serve India and the South Asian export market. 
  • Engine: Single Safran Arriel 2D turboshaft engine with a take-off power of 847 shp.
  • Speed & Range: Features a maximum cruise speed of 140 knots (259 km/h) and a range of 340 nautical miles (630 km).
  • Capacity: Can accommodate 1 pilot and up to 6 passengers in a high-density configuration.
  • Everest Record: It is the only helicopter to have successfully landed on and taken off from the summit of Mount Everest (29,029 feet).
  • Weight: Maximum takeoff weight (MTOW) of 2,250 kg (standard) or 2,370 kg with a dual hydraulic kit. 
Operational Roles & Variants
The H125 is designed as a multi-mission "workhorse" for various sectors: 
  • Civil & Parapublic: Used for emergency medical services (EMS), law enforcement, firefighting (up to 1,200-liter water capacity), and high-altitude tourism.
  • Military (H125M): A militarised version designed for tactical roles, surveillance, and search-and-rescue in challenging terrain.
  • Industrial Ecosystem: Beyond assembly, companies like Mahindra Aerostructures have been contracted to manufacture H125 fuselages locally, deepening the Indian aerospace supply chain. 
Strategic Significance for India
  • Regional Hub: The project positions India as a potential regional hub for helicopter exports within South Asia.
  • Economic Impact: The total investment is expected to exceed β‚Ή1,000 crore, creating thousands of direct and indirect skilled jobs.
  • Defense Modernization: It provides a modern solution for the Indian Armed Forces to replace aging light utility fleets (like the Cheetah and Chetak) operating in the Himalayas. 
 
 
 
Bee Corridors
 
Why in News?
The National Highways Authority of India (NHAI) officially launched this first-of-its-kind project to address the "ecological stress" faced by honeybees and other pollinators. 
 

Key Information & Features
  • Strategic Shift: The project marks a move away from purely "ornamental" or decorative roadside landscaping toward ecological plantations that support biodiversity.
  • Pollination Crisis: The initiative is a response to declining bee populations, which has adversely affected agricultural productivity and natural ecological balance in India. 
  • Continuous Vegetation: The corridors consist of linear stretches of bee-friendly plants—including trees, shrubs, herbs, and grasses—designed to provide a steady supply of nectar and pollen throughout the year.
  • Native Species Selection: NHAI will prioritise native, nectar-rich species such as Neem, Karanj, Mahua, Palash, Bottle Brush, Jamun, and Siris.
  • Strategic Spacing: Flowering clusters will be planted at intervals of 500 metres to 1 km. This specific distance corresponds to the average foraging range of honeybees and wild bees.
  • Natural Habitats: Unlike traditional manicured gardens, these corridors will deliberately retain natural elements like dead wood, hollow trunks, and flowering weeds to provide essential nesting and breeding spaces for insects.
  • Staggered Flowering: Plant species are selected to ensure a near-continuous blooming cycle across different seasons, preventing "food deserts" for bees. 
Rollout Targets (2026–27)
  • Initial Corridors: NHAI field offices are tasked with developing at least three dedicated pollinator corridors in the upcoming financial year.
  • Mass Plantation: Out of the 40 lakh trees planned for planting along National Highways in 2026–27, approximately 60% (24 lakh trees) will be dedicated to the Bee Corridor initiative.
  • Location Selection: Corridors will be established along suitable highway stretches and vacant NHAI land parcels, tailored to local agro-climatic conditions
Benefits & Significance
  • Agricultural Boost: By improving pollination services, the corridors are expected to directly enhance the yields of nearby farms and orchards.
  • Ecological Connectivity: They act as "green bridges," connecting fragmented habitats and allowing pollinators to move safely across large distances despite infrastructure growth.
  • Sustainable Infrastructure: This initiative positions India’s highway network as a contributor to environmental restoration rather than just a driver of carbon emissions. 
 
 

 
Nitric Oxide
 
Why in News?
  • Nicox announced positive FDA feedback on pre-NDA meeting for NCX 470, a nitric oxide-releasing eye drop that reduced intraocular pressure by up to 10 mmHg in Phase 3 trials for open-angle glaucoma and ocular hypertension; NDA submission is on track for summer 2026.
Key Scientific & Biological Information
  • Natural Molecule: Nitric oxide is a colourless, gaseous free radical produced naturally in the human body's blood vessel lining (endothelium) from the amino acid L-arginine.
  • Vasodilation: Its primary role is to signal smooth muscles to relax, causing blood vessels to widen. This process, called vasodilation, is essential for healthy blood pressure and nutrient delivery.
  • Triple Threat (Immune Function): NO possesses strong antibacterial, antifungal, and antiviral properties by damaging the DNA of pathogens and inhibiting their replication.
  • "Molecule of the Year": Recognized for its monumental impact, it was named "Molecule of the Year" by science in 1992, and its discovery earned the 1998 Nobel Prize in Physiology or Medicine.
  • Neurotransmission: In the brain, it acts as a retrograde messenger, helping to tune signals between nerve cells, which is vital for memory and learning. 
Clinical & Industrial Applications
  • Approved Use: Inhaled nitric oxide (iNO) is currently FDA-approved for treating persistent pulmonary hypertension in newborns.
  • Drug Mechanisms: Popular medications like Sildenafil (Viagra) work by enhancing the chemical signals downstream of the nitric oxide pathway to promote blood flow.
  • Industrial Impact: NO is a major intermediate in the chemical industry (e.g., producing nitric acid) but is also a serious air pollutant when generated by vehicle engines and power plants.
  • Atmospheric Role: It is related to, but distinct from, Nitrous Oxide (N2O), a potent greenhouse gas and anesthetic. 
 
 
 
Lepidocampa Sikkimensis
 
Why in News?
The Zoological Survey of India (ZSI) announced the discovery of this species, marking a major milestone for Indian taxonomy.
 

Key Information
  • First Indian Description: While 17 Diplura species were previously known in India, they were all described by foreign researchers. This is the first time an Indian research team has formally identified and described a species within this group.
  • Ending a Hiatus: The discovery, published in the journal Zootaxa, concludes a nearly 50-year gap in domestic research on Indian Diplura.
  • Molecular Breakthrough: The study provided the first-ever DNA barcode data globally for an Indian Lepidocampa species, bridging traditional morphology with modern genetic science. 
  • Classification: It is a wingless, six-legged micro-arthropod belonging to the primitive hexapod order Diplura (commonly known as "two-pronged bristletails").
  • Physical Features:
    • Appearance: Slender, translucent body.
    • Distinctions: Unique arrangement of body scales, specific bristle patterns (chaetotaxy), and specialized appendage structures.
    • Appendages: Features two elongated, tail-like appendages called cerci.
  • Habitat: Thrives in humus-rich soil and leaf litter within moist, temperate Himalayan forests.
  • Distribution: Currently recorded in the Eastern Himalayas, specifically near Ravangla (Sikkim) and Kurseong (West Bengal).
  • Ecological Role:
    • Acts as a vital part of the soil ecosystem by breaking down organic matter.
    • Plays a critical role in nutrient cycling and maintaining soil structure.
    • Serves as a biological indicator of soil health and ecosystem stability.
  • Additional Discovery: During this research, scientists also rediscovered a rare subspecies, Lepidocampa juradii bengalensis, which had not been seen in nearly five decades. 
 
 
 
Tulbul Navigation Barrage Project
 
Why in News?
The Tulbul Navigation Project (also known as the Wullar Barrage) is currently in the news because the Government of Jammu & Kashmir and the Central Government have initiated efforts to revive the project after it remained stalled for nearly 40 years. 
 

Key Information
  • Indus Waters Treaty (IWT) Suspension: Following the April 2025 terror attack in Pahalgam, India put the 1960 Indus Waters Treaty in abeyance.
  • Government Push: In February 2026, J&K Chief Minister Omar Abdullah confirmed his government is working with the Centre to restart the project, citing that the treaty's suspension removes the previous diplomatic hurdles.
  • New Project Report: Reports indicate that work has begun to prepare a detailed project report (DPR), expected to be completed within a year. 
  • Location: A navigation lock-cum-control structure proposed at the outlet of Wular Lake (one of Asia's largest freshwater lakes) on the Jhelum River in north Kashmir.
  • Primary Objective: To regulate water outflow from Wular Lake to maintain a minimum water depth (draft) of 4.4 to 4.5 feet in the Jhelum River. This ensures year-round navigability between Srinagar and Baramulla, especially during dry winter months (October to February).
  • Historical Timeline:
    • 1984: Construction began but was suspended in 1987 after strong objections from Pakistan.
    • Four Decades of Limbo: At least 13 rounds of secretary-level talks between India and Pakistan occurred over the years without resolution.
  • Pakistan's Objection: Pakistan argued the structure was a storage barrage that violated the IWT's restrictions on the "Western Rivers." They feared India could use it to control water flow, potentially causing droughts or floods downstream.
  • India's Stand: India maintains the project is for non-consumptive use (navigation), which is explicitly permitted under the IWT.
  • Technical Specs: The original design envisioned a 439-foot long and 40-foot-wide barrage with a water storage capacity of approximately 0.30 million acre-feet (MAF).
  • Anticipated Benefits:
    • Economic: Boosts inland water transport, tourism, and fisheries.
    • Power Generation: Regulated water flow would enhance the efficiency of downstream hydroelectric projects like Uri-I and Uri-II.
    • Flood Control: Helps stabilize water levels and manage seasonal flooding in the Kashmir Valley. 
 
 
 
Khorramshahr-4 Missile
 
Why in News?
Iran recently released footage showing the missile being deployed within highly fortified underground bunkers, signaling enhanced survivability against pre-emptive strikes. The display of these missiles coincides with rising tensions and indirect talks with the United States in Muscat, Oman, serving as a strategic signal of military readiness. 
 

Key Technical Specifications
  • Type: Medium-range ballistic missile (MRBM).
  • Range: An official operational range of 2,000 km, capable of reaching Israel and most U.S. bases in the Middle East.
  • Payload: Carries a massive 1,500 kg to 1,800 kg warhead, one of the heaviest in Iran’s fleet.
  • Speed: Reaches Mach 16 outside the atmosphere and Mach 8 during re-entry.
  • Fuel: Uses hypergolic (self-igniting) liquid fuel, which can be stored in the missile for years, reducing launch preparation time to under 15 minutes.
  • Accuracy: Features a mid-phase navigation system allowing it to correct its course while outside the atmosphere, with a margin of error (CEP) of 10–30 metres
Strategic Features
  • Multi-Target Capability: Reportedly capable of striking up to 80 targets upon reaching the target area.
  • No Grid Fins: Unlike previous variants, it lacks external fins, using internal guiding micromotors for path adjustment, which reduces its radar signature.
  • Evasive Maneuvers: Designed to zigzag during re-entry to bypass advanced air defence systems like the Arrow-3 or THAAD.
  • EW Resistance: The warhead can disable its own guidance system during re-entry to become invulnerable to electronic warfare jamming. 
 
 

 
Loggerhead Turtle
 
Why in News?
The Loggerhead Turtle (Caretta caretta) is currently in the news due to a major 17-year study published, which reveals that climate change is causing these turtles to shrink in size and produce fewer eggs. 
 

Key Information
  • Reproductive Decline: A long-term study published in the journal Animals (2026) found that warming oceans are "quietly eroding" the reproductive output of loggerheads.
  • Physical Shrinking: Researchers observed that female loggerheads are becoming smaller in size, leading to smaller "clutch sizes" (fewer eggs per nest).
  • Altered Breeding Cycles: While turtles are adapting by nesting earlier in the year due to warmer temperatures, the interval between their breeding seasons has doubled from two years to four years.
  • Rescue and Rehabilitation: In February 2026, a rare loggerhead named "Crush" made headlines in the UK after being rescued from a beach in Jersey. The turtle was cold-stunned (a hypothermia-like state) and is currently undergoing rehabilitation at the Weymouth Sea Life Centre. 
  • Scientific Identity: Scientifically known as Caretta caretta, it is the world’s largest hard-shelled turtle.
  • Physical Features:
    • Head & Jaws: Named "Loggerhead" for its massive head and exceptionally powerful jaws, used to crush hard-shelled prey like crabs, clams, and sea urchins.
    • Shell: Features a reddish-brown, heart-shaped carapace (top shell) and a pale-yellow plastron (bottom shell).
  • Navigation: Known as a "magnetic navigator," it uses the Earth’s geomagnetic field as a map to travel thousands of kilometres back to the exact beach where it was born (natal homing).
  • Diet: Primarily carnivorous/omnivorous, feeding on bottom-dwelling invertebrates, jellyfish, and occasionally algae.
  • Conservation Status:
    • IUCN Red List: Classified as Vulnerable.
    • Wildlife Protection Act (India): Listed under Schedule I, providing it the highest level of legal protection.
  • Major Threats:
    • Bycatch: Accidental capture in fishing gear (trawls, longlines, and gillnets) is the primary threat.
    • Climate Change: Warming sands lead to temperature-dependent sex determination, where hotter nests produce almost exclusively females, threatening the population's gender balance.
    • Pollution: Ingestion of marine debris, particularly plastic bags mistaken for jellyfish, causes internal blockages and death. 
Habitat & Distribution
  • Global Range: Found in the Atlantic, Pacific, and Indian Oceans, as well as the Mediterranean Sea.
  • Nesting Hotspots: Major nesting sites include Florida (USA), OmanGreece, and Western Australia.
  • Indian Context: While they do not typically nest on Indian beaches, they are frequently found in Indian coastal waters, and nests have been recorded in nearby Sri Lanka and the Gulf of Mannar
 
 

 
Food Safety and Standards Authority of India (FSSAI)
 
Why in News?
  • The Supreme Court directed FSSAI to provide a concrete action plan within four weeks regarding mandatory Front-of-Pack Labelling (FOPL) for foods high in sugar, salt, and fat.
Core Information & Statutory Framework
  • Scientific Evidence Mandate: FSSAI requires companies to provide hard scientific data (nutritional content, Indian consumption patterns, and toxicology) for all new food product approvals and health claims.
  • New Product Standards: Stricter standards for meat sausages, edible oils, and packaged drinking water came into effect, though a three-month extension for sausage compliance was granted until May 2026.
  • Nutraceutical Growth: FSSAI recently highlighted that India’s nutraceutical industry is poised to potentially surpass pharmaceuticals by tenfold, representing a strategic pillar for the "Viksit Bharat 2047" vision. 
  • Establishment: A statutory body formed under the Food Safety and Standards Act, 2006, consolidating older laws like the Prevention of Food Adulteration Act.
  • Ministry: Operates under the administrative control of the Ministry of Health & Family Welfare.
  • Headquarters: Located in New Delhi, with six regional offices in Delhi, Mumbai, Kolkata, Chennai, Guwahati, and Cochin.
  • Leadership: Currently headed by Chairperson Punya Salila Srivastava and CEO Rajit Punhani
Key Functions
  • Standard Setting: Framing science-based regulations for food products, additives, and contaminants.
  • Licensing: Granting mandatory FSSAI licenses/registrations to all Food Business Operators (FBOs), including manufacturers, retailers, and e-commerce platforms.
  • Surveillance: Conducting regular inspections and food sampling to curb adulteration; for instance, over 12,000 cases were launched against defaulting FBOs in FY 2024–25.
  • Certification: Accrediting food testing laboratories (NABL) and managing referral labs. 
Major Initiatives
  • Eat Right India: A flagship movement focusing on safe, healthy, and sustainable food. It includes specific certifications like "Eat Right Station" and "Eat Right Campus" (recently awarded to over 500 hospitals and 100 jails).
  • State Food Safety Index (SFSI): An annual ranking of states based on five parameters including compliance and consumer empowerment. Kerala and Tamil Nadu were top performers in the 2024 index.
  • Food Fortification: Promoting the use of the "+F" logo for staples like rice, wheat, and milk fortified with essential vitamins and minerals.
  • Clean Street Food: Initiatives like "Prasadam" (India's first healthy food street in Ujjain) and training programs for thousands of street vendors. 
 
 
 
India France Relation
 
Why in News?
India and France have significantly elevated their relationship to a "Special Global Strategic Partnership" during French President Emmanuel Macron’s three-day official visit to India from February 17–19, 2026

Key Information
  • Special Global Strategic Partnership: Prime Minister Narendra Modi and President Macron upgraded bilateral ties to this new status in Mumbai, aimed at guiding cooperation for the next several decades.
  • Inauguration of H125 Helicopter Facility: The leaders virtually inaugurated India's first private-sector helicopter Final Assembly Line (FAL) for the Airbus H125 in Vemagal, Karnataka, established by Tata Advanced Systems Limited (TASL).
  • Mega Rafale Deal Progress: The visit coincides with the clearing of a landmark proposal to acquire 114 Rafale fighter jets for the Indian Air Force, valued at approximately β‚Ή3.25 lakh crore ($39 billion).
  • AI Impact Summit: President Macron participated in the first global artificial intelligence summit hosted in the Global South, held in New Delhi on February 19, 2026.
  • Year of Innovation 2026: The leaders launched the India-France Year of Innovation 2026 to deepen collaboration in advanced manufacturing, clean energy, and digital technology.
  • Strategic Pillars: The relationship is built on three core pillars: mutual respect for non-interference, a firm commitment to strategic autonomy, and refraining from involving each other in rival alliances.
  • Defence & Security:
    • Renewed Pact: India and France renewed their defence cooperation agreement for another 10 years on February 17, 2026.
    • Major Deals: Includes the ongoing Scorpene-class submarine project and the recent β‚Ή63,000 crore deal for 26 Rafale-M (Marine) jets for the Indian Navy.
    • Joint Exercises: Regular drills include Varuna (Navy), Shakti (Army), and Garuda (Air Force).
  • Technology & Innovation:
    • Digital Integration: France was the first European country to implement UPI payments (launched at the Eiffel Tower).
    • Supercomputing: Collaborative development of 14 supercomputers for India, including the Param Siddhi.
  • Space & Nuclear Energy:
    • Civil Nuclear: Collaboration continues on the Jaitapur Nuclear Power Project in Maharashtra and new declarations of intent for Small Modular Reactors (SMRs).
    • Space: Long-standing partnership between ISRO and CNES on missions like TRISHNA and future Mars/Venus exploration.
  • Economic Relations:
    • France is India’s 11th largest foreign investor (approx. $10.9 billion cumulative).
    • Over 750 French companies operate in India, employing more than 450,000 people.
  • People-to-People Links:
    • Student Mobility: An agreement exists to welcome 30,000 Indian students to France by 2030, supported by five-year Schengen visas for alumni.
    • Cultural Symbols: A statue of the Indian sage poet Thiruvalluvar was recently unveiled in Cergy, France. 
 
 



Question & Answer
 
Question 1. Consider the following features of the 'Khorramshahr-4' missile:
1. It is a medium-range ballistic missile (MRBM) using hypergolic liquid fuel.
2. It lacks external grid fins, using internal guiding micromotors instead.
3. It is designed to disable its own guidance system during re-entry to resist electronic warfare jamming.

Select your answer:
A) 1 and 2 only
B) 2 and 3 only
C) 1 and 3 only
D) 1, 2 and 3
 
Explanation: (D)
All statements are correct. The Khorramshahr-4 (Iran) uses self-igniting liquid fuel, lacks external fins to reduce radar signature (using micromotors for path correction), and features a warhead that can shut down guidance during re-entry to bypass electronic jamming.
 
 
Question 2. The India-France relationship was recently upgraded to a 'Special Global Strategic Partnership'. This partnership is fundamentally based on which 'three pillars'?
 
Select your answer:
A) Climate Action, Economic Liberalization, and Cultural Exchange
B) Mutual respect for non-interference, strategic autonomy, and refraining from rival alliances
C) Space exploration, Nuclear disarmament, and Counter-terrorism
D) Unified Currency, Open Borders, and Joint Maritime Patrols
 
Explanation: (B)
The strategic relationship between India and France is built on three core pillars: mutual respect for non-interference, a firm commitment to strategic autonomy, and refraining from involving each other in rival alliances. This sets it apart from traditional military alliances.
 
 
Question 3. With reference to the 'Bee Corridor' project recently launched by the National Highways Authority of India (NHAI), consider the following statements:
1. It involves a shift from purely ornamental landscaping to ecological plantations along national highways.
2. The initiative prioritizes exotic flowering species to maximize nectar production throughout the year.
3. Flowering clusters are strategically spaced at intervals that align with the average foraging range of honeybees.

Select your answer:
A) 1 only
B) 1 and 3 only
C) 2 and 3 only
D) 1, 2 and 3
 
Explanation: (B)
Statement 1 is correct as it marks a move toward biodiversity-focused landscaping. Statement 2 is incorrect because NHAI prioritizes native, nectar-rich species like Neem, Karanj, and Palash, not exotic ones. Statement 3 is correct as clusters are placed at 500m to 1km intervals based on bee foraging ranges.
 
 
Question 4. The recently discovered species 'Lepidocampa Sikkimensis' is best described as:
 
Select your answer:
A) A new variety of medicinal plant found in the alpine meadows of the Western Ghats.
B) A wingless, soil-dwelling micro-arthropod belonging to the primitive hexapod order Diplura.
C) A nocturnal migratory bird that has returned to the Eastern Himalayas after 50 years.
D) An invasive fungal species threatening the tea plantations of Darjeeling.
 
Explanation: (B)
Lepidocampa Sikkimensis is a wingless, six-legged micro-arthropod (two-pronged bristletail) belonging to the order Diplura. It was recently described by an Indian team from the Eastern Himalayas and serves as a biological indicator of soil health.
 
 
Question 5. Regarding the Food Safety and Standards Authority of India (FSSAI), which of the following statements is correct?
 
Select your answer:
A) It is a non-statutory body under the Ministry of Consumer Affairs, Food and Public Distribution.
B) The Supreme Court recently directed it to implement mandatory 'Front-of-Pack Labelling' (FOPL) for foods high in sugar, salt, and fat.
C) The 'Eat Right Station' certification is a global initiative led by the WHO and implemented in India by FSSAI.
D) FSSAI has banned the growth of the nutraceutical industry to protect the traditional pharmaceutical sector.
 
Explanation: (B)
Statement B is correct as the Supreme Court has pushed for FOPL. Statement A is wrong (it's statutory under the Ministry of Health). Statement C is wrong (it's a flagship FSSAI initiative, not a WHO-led one). Statement D is wrong (FSSAI actively promotes the nutraceutical industry for 'Viksit Bharat 2047').
 
 
Question 6. The 'Tulbul Navigation Project', which has seen recent efforts for revival, is located on which river and is associated with which major international treaty?
 
Select your answer:
A) Chenab River; Indus Waters Treaty
B) Jhelum River; Indus Waters Treaty
C) Ravi River; Permanent Settlement Act
D) Indus River; Tashkent Declaration
 
Explanation: (B)
The Tulbul Project (or Wular Barrage) is located at the outlet of Wular Lake on the Jhelum River in Jammu & Kashmir. It has been a point of contention between India and Pakistan under the 1960 Indus Waters Treaty (IWT).
 
 
Question 7. Consider the following statements regarding the H125 Final Assembly Line (FAL) recently established in India:
1. It marks the first time a private Indian company will undertake the full assembly of a helicopter.
2. The facility is a joint venture between Hindustan Aeronautics Limited (HAL) and Airbus.
3. The H125 is the only helicopter to have successfully landed on the summit of Mount Everest.

Select your answer:
A) 1 and 2 only
B) 2 and 3 only
C) 1 and 3 only
D) 1, 2 and 3
 
Explanation: (C)
Statement 1 is correct as Tata Advanced Systems Limited (TASL) is the first private company in India to undertake full helicopter assembly. Statement 2 is incorrect because the partnership is between Airbus and TASL (a private entity), not HAL. Statement 3 is correct as the H125 holds the record for landing on and taking off from the summit of Mount Everest.
 
 
Question 8. In the context of biological sciences, 'Nitric Oxide' (NO) is often discussed for its diverse roles. Which of the following statements is INCORRECT regarding Nitric Oxide?
 
Select your answer:
A) It is a gaseous free radical that acts as a potent vasodilator in the human body.
B) It is the primary greenhouse gas responsible for stratospheric ozone depletion, identical to Nitrous Oxide (N2O).
C) It plays a role in the immune system by damaging the DNA of pathogens.
D) It acts as a retrograde messenger in the brain, influencing memory and learning.
 
Explanation: (B)
Statement B is incorrect because Nitric Oxide (NO) is distinct from Nitrous Oxide (N2O). While N2O is a potent greenhouse gas and anesthetic, NO is a signaling molecule and industrial intermediate that is also a common air pollutant from engines, but not the primary gas for ozone depletion in the context of being identical to N2O.
 
 
Question 9. With reference to the Loggerhead Turtle (Caretta caretta), which of the following statements is correct?
 
Select your answer:
A) It is the only sea turtle species that is strictly herbivorous throughout its life cycle.
B) In India, it is listed under Schedule II of the Wildlife Protection Act, providing limited protection.
C) Warming sands due to climate change lead to a 'feminization' of the population as hotter nests produce mostly females.
D) They are known as 'magnetic navigators' because they migrate using underwater seismic currents.
 
Explanation: (C)
Statement C is correct; loggerhead turtles exhibit temperature-dependent sex determination, where higher temperatures result in female offspring. Statement A is wrong (they are carnivorous/omnivorous), B is wrong (Schedule I protection), and D is wrong (they use the Earth's geomagnetic field, not seismic currents).

 

Download Pdf
Get in Touch
logo Get in Touch