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Type: Prelims Only

  • Innovations in Biotechnology and Medical Sciences

    What are the Diatoms?

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Diatoms

    Mains level: Not Much

    The Maharashtra Anti-Terrorism Squad has relied on a forensic test known as diatom tests for leads in an alleged murder case of a person inviting high stage political drama.

    What are Diatoms?

    • Diatoms are photosynthesizing algae that are found in almost every aquatic environment including fresh and marine waters, soils, in fact, almost anywhere moist.
    • Diatoms have cell walls made of silica, each species has a distinct pattern of tiny holes in the cell wall (frustule) through which they absorb nutrients and get rid of waste.
    • A diatom is a photosynthetic, single-celled organism which means they manufacture their own food in the same way plants do.

    Diatoms are important as they:

    • provide the basis of the food chain for both marine and freshwater micro-organisms and animal larvae
    • are a major source of atmospheric oxygen responsible for 20-30% of all carbon fixation on the planet
    • can act as environmental indicators of climate change
    • form the basis of some household goods such as pest/mite prevention and mild abrasive

    Never underestimate UPSC. Try this PYQ before you reach any conclusion.

    Q.Which one of the following is the correct sequence of a food chain?

    (a) Diatoms-Crustaceans-Herrings

    (b) Crustaceans-Diatoms-Herrings

    (c) Diatoms-Herrings-Crustaceans

    (d) Crustaceans-Herrings-Diatoms

    What is a diatom test?

    • Diagnosis of death by drowning is deemed as a difficult task in forensic pathology.
    • A number of tests have been developed to confirm the cause of such deaths with the diatom test emerging as one of the most important tests.
    • The test entails findings if there are diatoms in the body being tested.

    The science behind

    • A body recovered from a water body does not necessarily imply that the death was due to drowning.
    • If the person is alive when he enters the water, the diatoms will enter the lungs when the person inhales water while drowning.
    • These diatoms then get carried to various parts of the body, including the brain, kidneys, lungs and bone marrow by blood circulation.
    • If a person is dead when is thrown in the water, then there is no circulation and there is no transport of diatom cells to various organs.
  • Modern Indian History-Events and Personalities

    Places on PM Modi’s Bangladesh Visit

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Read the attached story

    Mains level: NA

    PM Modi will be on a two-day visit to Bangladesh where he will take part in commemorations of some epochal events there.

    Bangabandhu shrine in Tungipara

    • Located about 420 kilometres from Dhaka, Tungipara was the place of birth of Rahman, the architect of the 1971 Bangladesh War of Independence.
    • This is also the place where he lies buried inside a grand tomb called the ‘Bangabandhu mausoleum’.
    • Millions of people gather here every year on August 15, to observe the day when Rahman was assassinated by a group of disgruntled army officers.

    Harichand Thakur’s shrine in Orakandi

    • Thakur was the founder of the Matua Mahasangha, which was a religious reformation movement that originated in Orakandi in about 1860 CE.
    • At a very early age, Thakur experienced spiritual revelation, following which he founded a sect of Vaishnava Hinduism called Matua.
    • Members of the sect were the namasudras who were considered to be untouchables.
    • The objective of Thakur’s religious reform was to uplift the community through educational and other social initiatives.
    • Members of the community consider Thakur as God and an avatar of Vishnu or Krishna.
    • After the 1947 Partition, many of the Matuas migrated to West Bengal.

    ‘Sugandha Shaktipith’ (Satipith) temple in Shikarpur

    • Modi is also scheduled to visit the Sugandha Shaktipeeth which is located in Shikarpur, close to Barisal.
    • The temple, dedicated to Goddess Sunanda is of immense religious significance to Hinduism.
    • It is one of the 51 Shakti Pith temples.
    • The Shakti Pith shrines are pilgrimage destinations associated with the Shakti (Goddess worship) sect of Hinduism.

    Rabindra Kuthi Bari in Kushtia

    • The Kuthi Bari is a country house built by Dwarkanath Tagore, the grandfather of Nobel laureate and Bengali poetic giant Rabindranath Tagore.
    • The latter stayed in the house for over a decade in irregular intervals between 1891 and 1901.
    • In this house Tagore composed some of his masterpieces like Sonar Tari, Katha o Kahini, Chaitali etc. He also wrote a large number of songs and poems for Gitanjali here.
    • It was also in this house that Tagore began translating the Gitanjali to English in 1912, for which he was awarded the Nobel Prize in Literature.

    Ancestral home of Bagha Jatin in Kushtia

    • Jatindranath Mukherjee, better known as ‘Bagha Jatin’ (tiger Jatin) was a revolutionary freedom fighter.
    • He was born in Kayagram, a village in Kushtia district, where his ancestral home is located.
    • Jatin acquired the epithet ‘Bagha’ after he fought a Royal Bengal Tiger all by himself and killed it with a dagger.
    • Jatin was the first commander-in-chief of the ‘Jugantar Party’ which was formed in 1906 as a central association dedicated to train revolutionary freedom fighters in Bengal.
    • This was the period when Bengal was seething with nationalist furore against Lord Curzon’s declaration of Partition of the province.
    • Inspired by Jatin’s clarion call, “amra morbo, jagat jagbe” (we shall die to awaken the nation), many young revolutionaries joined the brand of the freedom struggle that the Jugantar Party represented.

    His legend:

    • Jatin is most remembered for an armed encounter he engaged in with the British police at Balasore in Orissa.
    • They were expecting a consignment of arms and funds from Germany to lead an armed struggle when the British found out about the plot and raided the spot where the revolutionaries were hiding. A
    • lthough Jatin lost his life in the Battle of Balasore, his activities did have an impact on the British forces.
    • The colonial police officer Charles Augustus Tegart wrote about Jatin: “If Bagha Jatin was an Englishman, then the English people would have built his statue next to Nelson’s at Trafalgar Square.”
  • Innovations in Biotechnology and Medical Sciences

    [pib] What is Artificial Photosynthesis?

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Artificial Photosynthesis

    Mains level: Carbon sequestration through AP

    Scientists have found a method to mimic nature’s own process of reducing carbon dioxide in the atmosphere, namely photosynthesis, to capture excess carbon dioxide in the atmosphere.

    Artificial Photosynthesis

    • Artificial photosynthesis (AP) is a chemical process that mimics the natural process of photosynthesis to convert sunlight, water, and carbon dioxide into carbohydrates and oxygen.
    • The term artificial photosynthesis is commonly used to refer to any scheme for capturing and storing the energy from sunlight in the chemical bonds of fuel (a solar fuel).
    • Photocatalytic water splitting converts water into hydrogen and oxygen and is a major research topic of artificial photosynthesis.
    • Light-driven carbon dioxide reduction is another process studied that replicates natural carbon fixation.

    Try this PYQ:

    Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?

    1. Volcanic action
    2. Respiration
    3. Photosynthesis
    4. Decay of organic matter

    Select the correct answer using the code given below:

    (a) 1 and 3 only

    (b) 2 only

    (c) 1, 2 and 4 only

    (d) 1, 2, 3 and 4

    Challenges in AP

    • Research on this topic includes the engineering of enzymes and photoautotrophic microorganisms for microbial biofuel and biohydrogen production from sunlight.
    • This AP harnesses solar energy and converts the captured carbon dioxide to carbon monoxide (CO), which can be used as a fuel for internal combustion engines.
    • In AP, scientists are essentially conducting the same fundamental process in natural photosynthesis but with simpler nanostructures.
    • However, there are plenty of hurdles to overcome as a successful catalyst to carry out AP.

    What have Indian researchers achieved?

    • Indian researchers have designed and fabricated an integrated catalytic system based on a metal-organic framework (MOF-808) comprising of a photosensitizer that can harness solar power and a catalytic centre that can eventually reduce CO2.
    • A photosensitizer is a molecule that absorbs light and transfers the electron from the incident light into another nearby molecule.
    • The scientists have immobilized a photosensitizer, which is a chemical called ruthenium bipyridyl complex ([Ru (bpy)2Cl2]) and a catalytic part which is another chemical called rhenium carbonyl complex ([Re(CO)5Cl]).
    • They have fabricated it inside the nano space of a metal-organic framework for artificial photosynthesis.

    Outcomes of the research

    • The developed catalyst exhibited excellent visible-light-driven CO2 reduction to CO with more than 99% selectivity.
    • The catalyst also oxidizes water to produce oxygen (O2).
    • The Photocatalytic assembly, when assessed for CO2 reduction under direct sunlight in a water medium without any additives, showed superior performance of CO production.
    • Being heterogeneous, the integrated catalytic assembly can be reused for several catalytic cycles without losing its activity.

    Back2Basics:  Photosynthesis

    • It is the process by which green plants and certain other organisms transform light energy into chemical energy.
    • It is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism’s metabolic activities.
    • This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water – hence the name photosynthesis.
  • Innovation Ecosystem in India

    [pib] US India Artificial Intelligence (USIAI) Initiative

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: USIAI Initiative

    Mains level: Not Much

    The US India Artificial Intelligence (USIAI) Initiative was recently launched.

    USIAI Initiative

    • This initiative focuses on AI cooperation in critical areas that are priorities for both countries.
    • It has been launched by the Indo-U.S. Science and Technology Forum (IUSSTF).
    • The IUSSTF is a bilateral organisation funded by the Department of Science & Technology (DST), the GOI and the U.S. Department of States.
    • USIAI will serve as a platform to discuss opportunities, challenges, and barriers for bilateral AI R&D collaboration, enable AI innovation, help share ideas for developing an AI workforce etc.
    • AI R&D is being promoted and implemented in the country through a network of 25 technology hubs working as a triple helix set up under the National Mission on Interdisciplinary Cyber-Physical Systems (NM-ICPS).

    Back2Basics: Artificial intelligence (AI)

    • Artificial intelligence (AI) refers to the simulation of human intelligence in machines that are programmed to think like humans and mimic their actions.
    • The term may also be applied to any machine that exhibits traits associated with a human mind such as learning and problem-solving.
    • The ideal characteristic of artificial intelligence is its ability to rationalize and take actions that have the best chance of achieving a specific goal.
    • A subset of artificial intelligence is machine learning, which refers to the concept that computer programs can automatically learn from and adapt to new data without being assisted by humans.
    • Deep learning techniques enable this automatic learning through the absorption of huge amounts of unstructured data such as text, images, or video.
  • Indian Navy Updates

    Induction of INS Dhruv

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: INS Dhruv

    Mains level: India's naval arsenal

    India Navy is set to commission INS Dhruv to track satellites, strategic missiles and map the Indian Ocean bed later this year.

    INS Dhruv is no ordinary vessel for the Indian Navy. Read its stealth capabilities and utilities.

    INS Dhruv

    • INS Dhruv has been developed with the help of the DRDO and Indian Navy with India’s Strategic Force Command and National Technical Research Organisation (NTRO) as main intelligence consumers.
    • The indigenously-developed surveillance ship has been built by Hindustan Shipyard Ltd at its Visakhapatnam facility under the Atma Nirbhar Bharat Abhiyan initiative.
    • The 15,000-tonne ship, part of a classified project, will not only create maritime domain awareness for India in the Indian Ocean but also act as an early warning system for adversary missiles headed towards India.

    Stealth capabilities

    • INS Dhruv is equipped with active electronically scanned array radars, or AESA considered a game-changer in radar technology.
    • It can scan various spectrums to monitor satellites of adversaries that are watching over India.
    • It can also understand the range and true missile capability of adversary nations that it finds in the Indo-Pacific.

    Benefits offered

    • Once the vessel is commissioned, India will be the only country outside the P-5 – the US, the UK, China, Russia and France – to have this capability
    • It will act as a major force multiplier to India’s ocean surveillance capabilities.
    • It will be able to provide the Indian Navy with an “ECG of the Indian Ocean”.
  • Interstate River Water Dispute

    What is Rule Curve of a river?

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Mullaperiyar Dam

    Mains level: Interstate river water disputes in India

    The Supreme Court has warned the Tamil Nadu Chief Secretary against the failure to give information on the rule curve for Mullaperiyar dam.

    Do you know?

    The Mullaperiyar dam is located in Kerala on the river Periyar but is operated and maintained by the neighbouring state of Tamil Nadu.

    What is the Rule Curve?

    • A rule curve or rule level specifies the storage or empty space to be maintained in a reservoir during different times of the year.
    • Here the implicit assumption is that a reservoir can best satisfy its purposes if the storage levels specified by the rule curve are maintained in the reservoir at different times.
    • It decides the fluctuating storage levels in a reservoir.
    • The gate opening schedule of a dam is based on the rule curve.
    • It is part of the “core safety” mechanism in a dam.

    Why such a move?

    • During the high-voltage hearing, the Tamil Nadu government blamed Kerala for delaying the finalization of the rule curve for the 123-year-old dam.
    • Kerala government has accused Tamil Nadu of adopting an “obsolete” gate operation schedule dating back to 1939.

    About Mullaperiyar Dam

    • Mullaperiyar Dam is a masonry gravity dam on the Periyar River in the Indian state of Kerala.
    • It is located on the Cardamom Hills of the Western Ghats in Thekkady, Idukki District of Kerala.
    • It was constructed between 1887 and 1895 by John Pennycuick and also reached an agreement to divert water eastwards to the Madras Presidency area (present-day Tamil Nadu).
    • It has a height of 53.6 m from the foundation, and a length of 365.7 m.
    • The Periyar National Park in Thekkady is located around the dam’s reservoir.
    • The dam is built at the confluence of Mullayar and Periyar rivers.
  • Wildlife Conservation Efforts

    Project RE-HAB

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Project RE-HAB

    Mains level: Man-animal conflict

    The forest authorities intend to mitigate human-elephant conflict by installing bee boxes along the periphery of the forest and the villages under the Project RE-HAB.

    On similar lines, try this PYQ:

    Q.The term ‘M-STrIPES’ is sometimes seen in the news in the context of:

    (a) Captive breeding of Wild Fauna

    (b) Maintenance of Tiger Reserves

    (c) Indigenous Satellite Navigation System

    (d) Security of National Highways

    Project RE-HAB

    • Project RE-HAB stands for Reducing Elephant-Human Attacks using Bees. It is an initiative of the Khadi and Village Industries Commission (KVIC).
    • It intends to create “bee fences” to thwart elephant attacks in human habitations using honeybees.
    • Bee boxes have been placed on the ground as well as hung from the trees.
    • The boxes are connected with a string so that when elephants attempt to pass through, a tug causes the bees to swarm the elephant herds and dissuade them from progressing further.
    • This idea stems from the elephants’ proven fear of the bees.

    Areas covered by the project

    • The pilot project was launched at four locations around Chelur village in the Kodagu district of Karnataka.
    • These spots are located on the periphery of Nagarahole National Park and Tiger Reserve, known conflict zones.

    Benefits offered

    • The biggest advantage of Project RE-HAB is that it dissuades elephants without causing any harm to them.
    • It is extremely cost-effective as compared to various other measures such as digging trenches or erecting fences.
  • Road and Highway Safety – National Road Safety Policy, Good Samaritans, etc.

    Places in news: Baralacha Pass

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Baralacha Pass

    Mains level: Himalayan passes and tunnels of strategic importance

    For the first time ever, the Border Roads Organisation (BRO) has started work on reopening the crucial Baralacha Pass in Himachal Pradesh much before schedule to restore connectivity to Leh in Ladakh.

    Note all the Himalayan passes from their N-S sequences.

    Baralacha Pass

    • Bara-lacha la also known as Bara-lacha Pass is a high mountain pass in the Zanskar range connecting the Lahaul district in Himachal Pradesh to Leh district in Ladakh.
    • It is situated along the Leh–Manali Highway.
    • The Bhaga river, a tributary of the Chenab river, originates from Surya Taal lake, which is situated a few kilometres from the pass towards Manali.
    • The native name of Chenab “Chandrabhaga” represents the union of Chandra and Bhaga rivers downstream.
    • The pass also acts as a water-divide between the Bhaga River and the Yunan River.

    Why is this pass so important?

    • The BRO had kept crucial passes open for a longer duration to enable the Army to undertake advanced winter stocking for the thousands of additional troops deployed in Ladakh.
    • The team has traversed a total distance of 20 km in super high-altitude conditions scrupulously crossing the Baralacha La in the Zanskar range on foot amidst sub-zero freezing conditions.
    • Frequent avalanches and slides with 15 to 20 feet of snow accumulation.
  • e-Commerce: The New Boom

    Draft E-Commerce Policy

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Not Much

    Mains level: E-commerce regulation in India

    The Department for Promotion of Industry and Internal Trade (DPIIT) will soon come out with a common acceptable draft e-commerce policy.

    Earlier policy

    • The previous draft in July last year had proposed a regulator, an e-commerce law, periodic audit of companies that store or mirror Indian users’ data overseas.
    • The latest draft calls for streamlining of regulatory processes to ease the burden of compliance for activities related to e-commerce and regulations for data that will provide for sharing mechanism.

    What are the provisions of the new law?

    Data Usage

    • According to a revised draft, the government would lay down principles for the usage of data for industrial development, where such norms do not already exist.
    • They aim to put in place safeguards to prevent misuse and access of data by unauthorized persons.
    • Such safeguards may include regulating the cross-border flow of data pertaining to Indians and transactions taking place in India and the requirement of adequacy audits to be carried out by Indian firms.
    • As per the recent draft policy, violation of safeguards shall be viewed seriously and attract heavy penalties.

    Regulation, exports

    • Conformity assessment procedures will be put in place to verify that goods and services sold on e-commerce platforms meet required standards and technical regulations.
    • The government shall collect information from e-commerce platforms to aid it in making necessary decisions.
    • In order to ensure that e-commerce is not used to defraud customers, registration with an authority identified by the Government shall be mandatory.
    • The policy shall bring e-commerce exports on par with non-e-commerce exports by enabling online grant of drawbacks, advance authorization and GST refund.

    Consumer protection

    • As per the draft, e-commerce operators must ensure to bring out clear and transparent policies on discounts, including the basis of discount rates funded by platforms.
    • Such a move aims to ensure fair and equal treatment.
    • It said consumers have a right to be made aware of all relevant details about the goods and services offered for sale including country of origin, value addition in India etc.
    • In case the seller fails to establish the genuineness of his products within a reasonable time frame, the e-commerce platform shall delist the seller.
  • Historical and Archaeological Findings in News

    Govt. reconstitutes panel for studying mythical Sarasvati River

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Rigvedic rivers

    Mains level: Not Much

    The Centre has reconstituted an advisory committee to chalk out a plan for studying the mythical Sarasvati River for the next two years after the earlier panel’s term ended in 2019.

    Do you know?

    Rigveda describes India as a land of Sapta Sindhavah.

    There is a verse in Nadistuti sukta of Rigveda , hymn of praise of rivers which mentions the following 10 rivers: Ganga, Yamuna, Sarasvati, Sutudri, Parusni, Asikni, Marudvrdha , Vitasta , Arjikiya , Susoma.

    The Shutudri was Sutlej, Parushni was Ravi, Asikni was Chenab and Vitasta was Jhelum.

    Sarasvati River

    • The Sarasvati River is an extinct river mentioned in the Rig Veda and later Vedic and post-Vedic texts.
    • As a physical river, it is described as a small river ending in “a terminal lake (Samudra).
    • As the goddess Sarasvati, the main referent for the term “Sarasvati” which developed into an independent identity in post-Vedic times, she is described as a powerful river and mighty flood.
    • The Sarasvati is also considered by Hindus to exist in a metaphysical form, in which it formed a confluence with the sacred rivers Ganges and Yamuna, at the Triveni Sangam.

    Vedic reference of the river

    • Rigvedic and later Vedic texts have been used to propose identification with present-day rivers, or ancient riverbeds.
    • The Nadistuti hymn in the Rigveda (10.75) mentions the Sarasvati between the Yamuna in the east and the Sutlej in the west.
    • Later Vedic texts like the Tandya and Jaiminiya Brahmanas, as well as the Mahabharata, mention that the Sarasvati dried up in a desert.

    What led to its extinction?

    • Since the late 19th-century, scholars have proposed to identify the Rig Vedic Saraswati river with the Ghaggar-Hakra river system.
    • This flows through northwestern India and eastern Pakistan, between the Yamuna and the Sutlej.
    • Recent geophysical research suggests that the Ghaggar-Hakra system was glacier-fed until 8,000 years ago, and then became a system of monsoon-fed rivers.
    • ISRO has observed that major Indus Valley Civilization sites at Kalibangan (Rajasthan), Banawali and Rakhigarhi (Haryana), Dholavira and Lothal (Gujarat) lay along this course.
    • The Indus Valley Civilisation may have declined as a result of climatic change when the monsoons that fed the rivers diminished at around the time civilisation diminished some 4,000 years ago.