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About Extracellular Vesicles (EVs):

• EVs are small membranous nanoparticles secreted by all types of cells into the extracellular space.
• They can be found in numerous bodily fluids, including blood, urine, cerebrospinal fluid, and more.
• The biochemical composition of EVs mainly consists of lipids, proteins, and nucleic acids.
• Derived from cells, EVs obtain their appearance based on the cargo transferred from the donor cells, known as their molecular signature.
• Unlike other cellular components, EVs are not capable of replication.
• EVs are broadly classified into:
  • Exosomes (30–150 nm): Originate from endosomal compartments.
  • Microvesicles (100–1000 nm): Shed directly from the plasma membrane.
  • Apoptotic bodies (>1000 nm): Released by dying cells.
• EVs have a wide range of uses in various fields, and their therapeutic potential is currently being explored in many preclinical and clinical studies.
  • Intercellular communication:
    • EVs play an important role in intercellular communication by transferring biological molecules, such as proteins, lipids, and nucleic acids, between cells.
    • This process can influence various physiological and pathological processes, including immune response, tissue regeneration, and cancer progression.
  • Diagnostic markers:
    • EVs can serve as diagnostic markers for various diseases, as they contain biomolecules that reflect the physiological state of the parent cell.
    • For example, circulating EVs have been shown to contain biomarkers for cancer and neurodegenerative diseases, and their analysis can aid in disease diagnosis and prognosis.
  • Drug delivery:
    • EVs can be engineered to deliver therapeutic molecules, such as drugs or nucleic acids, to target cells.
    • These offer several advantages over traditional drug delivery systems, including high biocompatibility, low immunogenicity, and the ability to cross biological barriers.
  • Tissue engineering:
    • EVs can promote tissue regeneration and repair by modulating cellular behavior and signaling pathways.
    • These have been used in various tissue engineering applications, including bone regeneration, cartilage repair, and wound healing.

About Dibang River:

• It is an important tributary of the Brahmaputra.
• It flows through the states of Arunachal Pradesh and Assam.
• The Dibang Valley, a district of Arunachal Pradesh, is named after this river.
• Course:
  • It originates near Keya Pass on the Indo-Chinese border in the Upper Dibang Valley district of Arunachal Pradesh.
  • The region all along the upper course of the river is located in the Great Himalayan Mountain Range, with its northern and eastern reaches bordering Tibet.
  • Cutting deep gorges through the Mishmi Hills, it enters the plains at Nizamghat (Bomjir) and meets the Lohit and then the Dihang (Siang) River near Sadiya in Assam, below which the combined stream is known as the Brahmaputra.
  • It stretches from its origin in the Mishmi Hills to its confluence with the Brahmaputra River in Assam.
• Major Tributaries: Dri, Mathun, Talon, Eme, Ahi, Emra, and Awa.
• It is an important lifeline for the Idu Mishmi tribal community, supporting their traditional lifestyle, agriculture, and fishing practices.

Dibang Multipurpose Project:

• It is a flood control cum hydroelectric power project planned to be developed on the Dibang River in Arunachal Pradesh.
• At 2,880 MW installed capacity, it will be the country’s biggest hydropower facility.
• It is being developed by India’s state-run National Hydroelectric Power Corporation (NHPC).
• The Project is designed as an energy storage project, with flood moderation as one of the key objectives, besides power generation.
• It involves the construction of a 278-metre-high concrete gravity dam, which is planned to be India's highest concrete gravity dam.
• The dam is planned to be constructed with the Roller Compacted Concrete (RCC) technique, and it will be the highest RCC dam in the world.

About Red Ochre:

• It is a natural earth pigment, typically composed of iron oxide that ranges in color from yellow to deep red.
• It is one of the earliest pigments used by humankind, with a history stretching back tens of thousands of years.
• Early people applied it for frame and face painting, cave drawings, and ritual burials, which illustrates the pigment's cultural importance.
• It was used in Ancient cave paintings.

About Vitamin K:

• It is a fat-soluble vitamin that comes in two forms.
  • The main type is called phylloquinone (Vitamin K1), found in green leafy vegetables like collard greens, kale, and spinach.
  • The other type, menaquinones (Vitamin K2), are found in some animal foods and fermented foods.
    • Menaquinones can also be produced by bacteria in the human body.
  • Function:
    • Vitamin K is known as the clotting vitamin.
    • The body needs vitamin K to make certain proteins in the liver that cause blood to clot. These proteins are called clotting factors.
    • Prothrombin is a vitamin K-dependent protein directly involved with blood clotting.
    • Vitamin K helps maintain strong bones in older adults. Osteocalcin is a protein that requires vitamin K to produce healthy bone tissue.
    • Researchers suggest that this vitamin has other benefits too, such as easing morning sickness and protecting cognitive functions, including thinking, memory, learning, and organizing skills.
    • It may also help protect heart health.

What is Vitamin K Deficiency Bleeding (VKDB)?

• It is also known as haemorrhagic disease of the newborn.
• This is a bleeding disorder caused in babies when they don't have enough vitamin K to help their blood to clot.
• Newborns have low levels of vitamin K due to low amounts being transferred across the placenta during pregnancy, low amounts in breast milk, and not having enough gut bacteria to create vitamin K initially.
• The limited amount of blood clotting proteins at birth increases the risk of bleeding in infants if they are not given vitamin K supplements.

About Sindhudurg Fort:

• It is a historical fort that occupies an islet in the Arabian Sea, just off the coast of Maharashtra.
• The fort was built by Shivaji Maharaj between 1664 and 1667.
• The main objective was to counter the rising influence of foreign colonizers (English, Dutch, French, and Portuguese merchants) and to curb the rise of the Siddis of Janjira.
• It is recognized as a UNESCO World Heritage Site as part of the Maratha Military Landscapes of India.

About Insurance Regulatory and Development Authority of India:

• It is a statutory body formed under the Insurance Regulatory and Development Authority Act, 1999 (IRDAI Act 1999), for the overall supervision and development of the insurance sector in India.
• It acts under the Ministry of Finance, Government of India.
• The main goals of IRDAI are:
  • To safeguard the interest of the policyholders by fair business conduct and settlement of claims within time.
  • Developing and nurturing the Indian insurance industry.
  • To regulate the business of insurance with transparency, fairness, and honest practice.
  • Facilitating financial prudence of the insurers through solvency and stability checks of insurers.
  • To regulate premium charges and policy terms for preventing unscrupulous pricing and unaffordability.
• It is responsible for registering and/or licensing insurance, reinsurance companies, and intermediaries according to the regulations. 
• It sets the eligibility criteria, qualifications, and capital requirements for obtaining licenses in the insurance business.
• Composition: It consists of a Chairman, five full-time members, and four part-time members, all appointed by the Government of India.
• Head Office: Hyderabad.

About Ranivas Mound:

• Location: It is located in Bihar
• It is situated near the ‘Kesariya stupa’.
• In 1861, Alexander Cunningham (Archaeological Survey of India (ASI) first director general), visited the site.
  • He explored the mound and conducted some excavations. In his report, he mentioned the existence of an old Buddhist establishment with a temple enshrining a huge image of Buddha.
  • Archaeological sites and ancient monuments of national importance are declared under The Ancient Monuments and Archaeological Sites and Remains Act, 1958 (AMASR Act).

Key Facts about Archaeological Survey of India (ASI):

• It was established in 1861 under Sir Alexander Cunningham.
• It works to protect India’s historical heritage, including ancient temples, forts, tombs, sculptures and archaeological remains.
• It conducts scientific excavations, studies inscriptions, maintains protected monuments and helps preserve evidence of India’s past.
• The headquarters of the Archaeological Survey of India is in New Delhi.
• Its work is governed by important laws, including the Ancient Monuments and Archaeological Sites and Remains Act, 1958, and the Antiquities and Art Treasures Act, 1972.

About Ecuador:

• Location: It is a country located on the northwestern edge of South America.
• Bordering countries: It is bordered by Colombia and Peru
• Maritime boundaries: It shares borders with the Pacific Ocean to the west.
• Capital City: Quito
• Geographical Features of Ecuador:
  • It consists of 4 geographic regions namely
  • Coastal lowlands and mountain area; the Central Andes Mountains and its two major chains Cordillera Occidental in the West and the Cordillera Oriental in the east.
  • Climate: Tropical along coast, becoming cooler inland at higher elevations; tropical in Amazonian jungle lowlands.
  • Highest Point: Mount Chimborazo
  • Volcano: Cotopaxi is one of the world’s highest active volcanoes located in the Andes Mountains
  • Rivers: It is drained by rivers Babahoyo, Chira, Coca, Curaray.

About Ningol Chakouba Festival:

• It is celebrated every year in Manipur on the second day of Hiyangei month of the Meitei calendar.
• Ningol means ‘married woman’ and Chakouba means ‘invitation for feast’; so the festival is the one where the married women are invited to their parents’ home for a feast. 
• The main component of the festival is the visit of married sisters to their maternal homes for grand feast and joyous reunion followed by giving away the gifts.
• It is customary for the son of the family to extend a formal invitation to his sister for Ningol Chakkouba a week before the gathering.