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Question 501

National Defence Academy (NDA) 2025• General Ability Test

Clotting of blood involves which one among the following clotting proteins?

  1. AOption (a)

    Pathogen

  2. BOption (b)

    Fibrinogen

  3. COption (c)

    Macrophage

  4. DOption (d)

    Phagocytes

View answer & explanation

Correct answer

Answer: (b)B.

Fibrinogen

Why this answer is correct

The correct answer is Fibrinogen

Concept:

  • Blood clotting (also known as coagulation) is a critical process that prevents excessive bleeding when a blood vessel is injured.
  • It involves a series of steps where clotting proteins in blood plasma work together to form a clot that seals the injured site.
  • Fibrinogen is a key protein involved in this process. It is a soluble plasma protein that is converted into insoluble fibrin during the clotting cascade.

Key Points About Fibrinogen:

  • Fibrinogen is produced by the liver and circulates in the blood in an inactive form.
  • When an injury occurs, the enzyme thrombin is activated as part of the clotting cascade. Thrombin converts fibrinogen into fibrin.
  • Fibrin forms a mesh-like structure that traps red blood cells and platelets, creating a stable blood clot.
  • This clot acts as a temporary seal to prevent further blood loss and allows the vessel to heal.
  • A deficiency or dysfunction in fibrinogen can lead to bleeding disorders, while excessive clotting can result in thrombosis.

Other Options:

  • Pathogen: Pathogens are microorganisms such as bacteria, viruses, and fungi that cause diseases. They are not involved in the blood clotting process.
  • Macrophage: Macrophages are a type of white blood cell involved in the immune response. They help by engulfing and digesting pathogens and cellular debris but play no role in blood clotting.
  • Phagocytes: Phagocytes are immune cells that engulf and destroy pathogens and debris. While they are part of the immune system, they do not contribute to the clotting mechanism.

Question 502

National Defence Academy (NDA) 2025• General Ability Test

Initial discovery of antibiotic penicillin was done by

  1. AOption (a)

    Francis Crick

  2. BOption (b)

    Maurice Wilkins

  3. COption (c)

    Charles Darwin

  4. DOption (d)

    Alexander Fleming

View answer & explanation

Correct answer

Answer: (d)D.

Alexander Fleming

Why this answer is correct

The correct answer is Alexander Fleming

Concept:

  • Antibiotics are compounds that kill or inhibit the growth of bacteria, and they revolutionized medicine by providing effective treatment for bacterial infections.
  • The discovery of penicillin, the first widely used antibiotic, marked a significant breakthrough in medical science and has saved millions of lives.
  • Penicillin was discovered accidentally by Alexander Fleming in 1928 when he noticed that a mold called Penicillium notatum produced a substance that inhibited bacterial growth.

Explanation of Correct Answer:

  • Alexander Fleming: He was a Scottish bacteriologist who discovered penicillin, the first true antibiotic, in 1928.
  • Fleming observed that colonies of the bacterium Staphylococcus aureus were destroyed by a mold contaminant on a culture plate.
  • He identified the mold as Penicillium notatum and named the substance it produced "penicillin." This discovery earned him, along with Howard Florey and Ernst Boris Chain, the Nobel Prize in Physiology or Medicine in 1945.

Other Options:

  • Francis Crick: Crick was a British molecular biologist, biophysicist, and neuroscientist, best known for co-discovering the structure of DNA (deoxyribonucleic acid) in 1953 alongside James Watson.
  • Maurice Wilkins: Wilkins was a British physicist and molecular biologist who contributed to the discovery of DNA's double-helix structure. He worked closely with Rosalind Franklin and shared the 1962 Nobel Prize in Physiology or Medicine with Watson and Crick.
  • Charles Darwin: Darwin was a British naturalist best known for his theory of evolution by natural selection, published in his seminal work, On the Origin of Species in 1859.

Question 503

National Defence Academy (NDA) 2025• General Ability Test

The vector of malaria parasites is

  1. AOption (a)

    Male Anopheles mosquito

  2. BOption (b)

    Male Culex mosquito

  3. COption (c)

    Female Anopheles mosquito

  4. DOption (d)

    Female Culex mosquito

View answer & explanation

Correct answer

Answer: (c)C.

Female Anopheles mosquito

Why this answer is correct

The correct answer is Female Anopheles mosquito

Explanation:

  • Malaria is a life-threatening disease caused by Plasmodium parasites. These parasites are transmitted to humans through the bites of infected mosquitoes.
  • The vector responsible for transmitting malaria is the Female Anopheles mosquito, which acts as the carrier of the Plasmodium parasites.
  • The Female Anopheles mosquito is the primary vector responsible for malaria transmission.
  • Female Anopheles mosquitoes feed on human blood to obtain nutrients needed for egg production, and during this process, they can transmit Plasmodium parasites if they are infected.
  • Plasmodium parasites have a complex life cycle that involves both humans and mosquitoes. When a Female Anopheles mosquito feeds on the blood of an infected person, it ingests Plasmodium gametocytes. These gametocytes develop into sporozoites in the mosquito's salivary glands. When the mosquito bites another person, the sporozoites enter the human bloodstream, initiating the infection.
  • The Female Anopheles mosquito is the only type of mosquito capable of transmitting malaria, as it provides the necessary environment for the Plasmodium parasite to complete its life cycle.

Other Options:

  • Male Anopheles mosquito: Male mosquitoes do not feed on blood; they primarily feed on nectar and other plant juices. Therefore, they cannot transmit malaria or any other blood-borne diseases.
  • Male Culex mosquito: Similar to Male Anopheles mosquitoes, Male Culex mosquitoes feed on nectar and are not involved in disease transmission.
  • Female Culex mosquito: While Female Culex mosquitoes do feed on blood, they are not vectors for malaria. Instead, they are known to transmit other diseases, such as West Nile virus, filariasis, and Japanese encephalitis.

Question 504

National Defence Academy (NDA) 2025• General Ability Test

Which of the following pairs is/are correctly matched?

1.Malaria : Mycobacterium

2.TB : Plasmodium

Select the answer using the code given below:

  1. AOption (a)

    1 only

  2. BOption (b)

    2 only

  3. COption (c)

    Both 1 and 2

  4. DOption (d)

    Neither 1 nor 2

View answer & explanation

Correct answer

Answer: (d)D.

Neither 1 nor 2

Why this answer is correct

The correct answer Neither 1 nor 2

Explanation:

  • Malaria is caused by a protozoan parasite from the genus Plasmodium, transmitted by the bite of infected female Anopheles mosquitoes.
  • Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis, which primarily affects the lungs but can also impact other parts of the body.

 Since both statements are incorrect, the correct answer is Neither 1 nor 2.

Question 505

National Defence Academy (NDA) 2025• General Ability Test

Vitamin B1 is also known as

  1. AOption (a)

    Riboflavin

  2. BOption (b)

    Thiamin

  3. COption (c)

    Retinol

  4. DOption (d)

    Tocopherol

View answer & explanation

Correct answer

Answer: (b)B.

Thiamin

Why this answer is correct

The correct answer is Thiamin

Concept:

Vitamins are organic compounds required in the diet in small quantities to perform biological functions.

Classification of Vitamins:

  • Fat-soluble vitamins: These are absorbed in dietary fats and stored in adipose tissues and the liver. These include vitamins A, D, E, and K.
  • Water-soluble vitamins are dissolved in water and readily excreted by the kidneys, requiring regular supplements. These include vitamin C and B complex vitamins.

Explanation:

  • Vitamin B1, also known as Thiamin, is a water-soluble vitamin that plays a critical role in energy metabolism and the functioning of the nervous system.
  • It is involved in the conversion of carbohydrates into energy by acting as a coenzyme in the metabolism of glucose.
  • The body cannot store thiamin in large amounts, so it needs to be consumed regularly through diet or supplements.
  • Deficiency in thiamin can lead to conditions such as beriberi (affecting the cardiovascular and nervous systems) and Wernicke-Korsakoff syndrome (commonly seen in alcoholics).
  • Good sources of Vitamin B1 include whole grains, legumes, nuts, seeds, and meat (especially pork).

Explanation of Other Options:

  • Riboflavin: Riboflavin is Vitamin B2. It helps in energy production, maintains healthy skin and eyes, and supports the nervous system. It is also involved in the metabolism of fats, carbohydrates, and proteins.
  • Retinol: Retinol is Vitamin A, which is crucial for vision, immune function, and skin health.
  • Tocopherol: Tocopherol is Vitamin E. It acts as an antioxidant and helps protect cells from damage caused by free radicals. It also plays a role in immune function and skin health.

Additional Information 

VitaminMain functionDeficiencyPrincipal source
B1(Thiamine)Growth of body metabolismBeri-Beri Cardiomegaly, indigestionMeat, Milk,soyabean
B2(Riboflavin)Strength eye Growth of bodyOpacities in cornea, scars on the tongueMeat,soyabean,milk, green leafy vegetables
B3(Nicotinamide)Controls the Cholesterol level, metabolismPellagraMeat,groundnut,curd
B5(Pantothenic Acid)Proper function of various enzymes, metabolismBurning feet syndrome AchromotrichiaMeat, milk,eggs
B6(Pyridoxine)Amino acid metabolism, Helps in the formation of bloodSkin diseasesMeat,liver,grains
B7(biotin) or Vitamin HMetabolism protects skin and hairsAnemia, AlopeciaMeat,eggs,milk,fruits
B9(Folic acid)Required in red blood cell synthesisMicrocytic anaemiaChocolate, groundnut, Papaya, kiwi
B12(Cobalamin)It contains cobalt Metabolise nitrogen RBC formationMegaloblastic anaemiaMeat,liver,yeast,eggs

Question 506

National Defence Academy (NDA) 2025• General Ability Test

Gaja Dwar, Ashwa Dwar, Garuda Dwar, Makar Dwar, Shardula Dwar and Hamsa Dwar are located in a building at

  1. AOption (a)

    New Delhi

  2. BOption (b)

    Varanasi

  3. COption (c)

    Aurangabad

  4. DOption (d)

    Thanjavur

View answer & explanation

Correct answer

Answer: (a)A.

New Delhi

Why this answer is correct

The correct answer is New Delhi.

Key Points

  • Gaja Dwar, Ashwa Dwar, Garuda Dwar, Makar Dwar, Shardula Dwar, and Hamsa Dwar are monumental gates located at the Rashtrapati Bhavan in New Delhi.
  • The Rashtrapati Bhavan is the official residence of the President of India and one of the most iconic buildings in India.
  • These gates are architecturally significant and represent different symbolic animals, showcasing Indian cultural motifs and heritage.
  • The Rashtrapati Bhavan was designed by Sir Edwin Lutyens and Herbert Baker during British colonial rule and inaugurated in 1931.
  • The gates serve as ceremonial entrances, reflecting the grandeur and historical importance of the Rashtrapati Bhavan.

Additional Information

  • Rashtrapati Bhavan:
  • The Rashtrapati Bhavan is spread over an area of 130 hectares, making it one of the largest residences of a head of state globally.
  • It consists of 340 rooms, including the President's official residence, guest rooms, offices, and reception halls.
  • The Mughal Gardens within the Rashtrapati Bhavan are a prominent feature and are opened to the public annually during "Udyanotsav."
  • Architectural Style:
  • The Rashtrapati Bhavan is designed in a blend of classical European and Indian architectural styles.
  • Its dome is inspired by the Sanchi Stupa, while the decorative elements reflect Indian traditions.
  • Ceremonial Gates:
  • Each gate is named after an animal, symbolizing strength, wisdom, and cultural significance in Indian tradition.
  • The gates are intricately designed with motifs and carvings that enhance their aesthetic and historical value.
  • Sir Edwin Lutyens:
  • He was the chief architect of New Delhi, responsible for designing several iconic structures, including Rashtrapati Bhavan.
  • Lutyens' Delhi is a term used to describe the central area of New Delhi that showcases his architectural vision.

Question 507

National Defence Academy (NDA) 2025• General Ability Test

Which dance form of India has been inscribed into UNESCO’s Representative List of Intangible Cultural Heritage of Humanity?

  1. AOption (a)

    Kathakali

  2. BOption (b)

    Garba

  3. COption (c)

    Bhangra

  4. DOption (d)

    Odissi

View answer & explanation

Correct answer

Answer: (b)B.

Garba

Why this answer is correct

The correct answer is Garba.

Key Points

  • Garba, a traditional dance form from Gujarat, India, was inscribed into UNESCO's Representative List of the Intangible Cultural Heritage of Humanity in 2022.
  • Garba is performed during the Navratri festival, which celebrates the victory of good over evil and honors Goddess Durga.
  • This dance form symbolizes devotion, community bonding, and celebration, performed in a circular formation around a lamp or an image of the goddess.
  • Garba's inclusion in UNESCO’s list highlights its cultural significance and efforts to preserve and promote India's intangible heritage globally.

Additional Information

  • UNESCO Representative List of Intangible Cultural Heritage:
  • This list aims to ensure the protection of cultural traditions and practices that communities recognize as part of their heritage.
  • India has multiple elements inscribed, including Yoga, Kumbh Mela, and now Garba.
  • Garba vs. Dandiya Raas:
  • Garba is performed with hand and foot movements, while Dandiya involves the use of sticks.
  • Both are popular during Navratri but differ in technique and presentation.
  • Navratri Festival:
  • A nine-day festival dedicated to Goddess Durga, celebrated with immense zeal across India, especially in Gujarat.
  • Garba is a central part of the Navratri celebrations.
  • India and Intangible Cultural Heritage:
  • India has a rich tradition of diverse art forms, practices, and festivals recognized globally.
  • Efforts are ongoing to document and preserve such traditions for future generations.

Question 508

National Defence Academy (NDA) 2025• General Ability Test

Which Ministry has initiated the “Dhara”, a special initiative dedicated to Indian Knowledge System (IKS)?

  1. AOption (a)

    The Ministry of Education

  2. BOption (b)

    The Ministry of Home Affairs

  3. COption (c)

    The Ministry of Information & Broadcasting

  4. DOption (d)

    The Ministry of Culture

View answer & explanation

Correct answer

Answer: (a)A.

The Ministry of Education

Why this answer is correct

The correct answer is The Ministry of Education.

Key Points

  • The Ministry of Education launched the "Dhara" initiative to promote the Indian Knowledge System (IKS).
  • "Dhara" focuses on revisiting and revitalizing India’s rich heritage of traditional knowledge across various domains such as arts, sciences, and culture.
  • The initiative is aligned with the goals of the National Education Policy (NEP) 2020, which emphasizes the incorporation of Indian culture and knowledge systems into education.
  • "Dhara" aims to create awareness about India's intellectual traditions and foster a sense of pride in its cultural legacy.
  • Through collaborations with experts, researchers, and institutions, the initiative seeks to document and disseminate valuable knowledge from India’s past.

Additional Information

  • Indian Knowledge System (IKS):
  • IKS refers to the traditional knowledge and practices developed over centuries in India, encompassing fields like Ayurveda, astronomy, mathematics, architecture, and philosophy.
  • It highlights India’s contributions to global knowledge and promotes the integration of traditional wisdom with modern advancements.
  • National Education Policy (NEP) 2020:
  • NEP 2020 emphasizes the inclusion of Indian culture and heritage in education to instill a sense of pride and identity among students.
  • It promotes experiential learning, critical thinking, and the study of ancient Indian texts and traditions.
  • Collaborative Framework:
  • The "Dhara" initiative involves partnerships with institutions like the Indian Institute of Technology (IITs), universities, and cultural organizations.
  • These collaborations aim to research, preserve, and disseminate India’s knowledge systems effectively.
  • Prominent Areas of Focus:
  • Key areas include Indian languages, traditional medicine, Vedic mathematics, and ancient sciences.
  • The initiative also explores the integration of IKS into contemporary education and research frameworks.

Question 509

National Defence Academy (NDA) 2025• General Ability Test

The scheme PRASHAD (Pilgrimage Rejuvenation & Spiritual Heritage Augmentation Drive) provides assistance for

  1. AOption (a)

    e-Visa Facility

  2. BOption (b)

    Multilingual Tourist Infoline

  3. COption (c)

    The development of tourism infrastructures in States & Union Territories

  4. DOption (d)

    Promoting Dekho Apna Desh scheme

View answer & explanation

Correct answer

Answer: (c)C.

The development of tourism infrastructures in States & Union Territories

Why this answer is correct

The correct answer is The development of tourism infrastructures in States & Union Territories.

Key Points

  • The PRASHAD scheme was launched by the Ministry of Tourism in 2014-15 to develop infrastructure for religious tourism.
  • It focuses on integrated development of pilgrimage destinations to provide better facilities to tourists.
  • The scheme provides financial assistance to State and Union Territory governments for the creation of tourism infrastructure such as parking spaces, restrooms, and information centers.
  • PRASHAD aims to encourage domestic and international tourism by improving accessibility and promoting cultural heritage.
  • The scheme aligns with India’s broader vision of sustainable tourism and cultural preservation.

Additional Information

  • Other Tourism Initiatives:
  • Dekho Apna Desh: A campaign encouraging citizens to explore domestic destinations.
  • Enables international tourists to easily obtain visas for visiting India.
  • Multilingual Tourist Infoline: A 24/7 helpline available in multiple languages to assist tourists.
  • Sustainable Tourism: The PRASHAD scheme promotes sustainable tourism practices to ensure minimal environmental impact.
  • Cultural Preservation: A key aim of PRASHAD is to preserve the cultural and spiritual heritage of India while enhancing visitor experiences.
  • Implementation Process: Projects under PRASHAD are selected based on their potential to attract tourists and generate employment in local communities.

Question 510

National Defence Academy (NDA) 2025• General Ability Test

The Joint Venture named ‘ASHVINI’ to develop nuclear power facility in India is between

  1. AOption (a)

    NPCIL and NTPC

  2. BOption (b)

     TMC and VECC

  3. COption (c)

    HWB and BARC

  4. DOption (d)

    IGACR and NTPC

View answer & explanation

Correct answer

Answer: (a)A.

NPCIL and NTPC

Why this answer is correct

The correct answer is NPCIL and NTPC.

Key Points

  • ASHVINI is a joint venture between the Nuclear Power Corporation of India Limited (NPCIL) and NTPC Limited.
  • The collaboration aims to develop nuclear power projects to diversify India's energy mix and enhance clean energy production.
  • Nuclear Power Corporation of India Limited (NPCIL) is responsible for the design, construction, commissioning, and operation of nuclear power reactors in India.
  • NTPC Limited is the largest power utility in India, focusing on thermal, hydro, and renewable energy projects, now venturing into nuclear energy through this partnership.
  • The joint venture aligns with India's objective of achieving a significant share of nuclear energy in its total energy generation to meet climate change commitments and energy security.

Additional Information

  • Nuclear Power Corporation of India Limited (NPCIL):
  • NPCIL operates under the Department of Atomic Energy (DAE), Government of India.
  • It was established in 1987 to ensure the safe and efficient use of nuclear energy for power generation.
  • NTPC Limited:
  • Established in 1975, NTPC is India's largest power producer, specializing in the generation and distribution of electricity.
  • It has been expanding its portfolio to include renewable energy, including solar and wind, and now nuclear power through this joint venture.
  • India's Energy Mix:
  • India's energy mix is currently dominated by coal, but there is a growing push toward renewable and nuclear energy to meet environmental goals.
  • Nuclear energy is seen as a reliable and low-carbon option to address energy security and reduce greenhouse gas emissions.
  • Government Initiatives for Nuclear Energy:
  • The Indian government has been promoting the use of nuclear energy through initiatives such as indigenous reactor development and international collaborations.
  • The goal is to achieve 20 GW of nuclear capacity by 2030 as part of India's climate action commitments under the Paris Agreement.