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RRB NTPC General Science and Life Science — practice questions

Explore 62 free General Science and Life Science questions in RRB NTPC Science. Open each question or exercise to read its content, reference answers and available explanation.

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General Science and Life Science questions and exercises with answers

Showing questions 1–30 of 62.

Which disease with bleeding gums did James Lind prevent using citrus fruits?Read the answer and worked solution →In human nutrition, dietary deficiency of vitamin D is well documented to cause which bone disease?Read the answer and worked solution →The disorder beriberi is caused by a nutritional lack of which vitamin?Read the answer and worked solution →Albert Szent-Gyorgyi was awarded a Nobel Prize for discovering which substance?Read the answer and worked solution →Which human dietary deficiency disease is specifically linked to an insufficient intake of niacin?Read the answer and worked solution →Danish scientists designated vitamin K by that letter because of its vital role in which physiological process?Read the answer and worked solution →Night blindness is clinically caused by a deficiency of which vitamin?Read the answer and worked solution →Which of the following sets correctly enumerates the four fat-soluble vitamins required by humans?Read the answer and worked solution →Why does excess intake of water-soluble vitamins rarely cause toxicity?Read the answer and worked solution →What is the official chemical and pharmacological name assigned to vitamin B1?Read the answer and worked solution →Folic acid supplementation during early pregnancy prevents which birth defect?Read the answer and worked solution →Which vitamin is synthesized in skin cells exposed to ultraviolet sunlight?Read the answer and worked solution →Which group of vitamins dissolves into cooking water and is lost if the water is discarded after boiling vegetables?Read the answer and worked solution →Who coined the scientific portmanteau term vitamine from vital amine in the year 1912?Read the answer and worked solution →Which membrane-bound organelles generate metabolic energy in eukaryotic cells?Read the answer and worked solution →What fundamental biological role is carried out by ribosomes in both prokaryotic and eukaryotic cells?Read the answer and worked solution →Which acidic cell organelle digests worn-out components with hydrolytic enzymes?Read the answer and worked solution →Which largest organelle in animal cells houses the chromosomes and serves as the primary site of DNA replication?Read the answer and worked solution →What cellulose-based structure surrounds the plasma membrane in plant cells to provide rigid structural support?Read the answer and worked solution →Which plant organelle captures sunlight to synthesize sugars by photosynthesis?Read the answer and worked solution →Which cytoplasmic organelle organized as cisternae processes and packages synthesized proteins and lipids?Read the answer and worked solution →The rough appearance of the rough endoplasmic reticulum under electron microscopy is due to attachedRead the answer and worked solution →What major defining structural feature is completely absent from prokaryotic cells unlike eukaryotic cells?Read the answer and worked solution →Biological classification places bacteria and archaea into which fundamental group of cellular organisms?Read the answer and worked solution →Which semipermeable biological structure encloses living cells and contains their cytoplasm?Read the answer and worked solution →Which cellular organelles function primarily to sequester waste products and maintain fluid balance in cells?Read the answer and worked solution →Which physiological process denotes genetically programmed cell death in biological tissue turnover?Read the answer and worked solution →Which intracellular organelle is specialized for calcium sequestration and synthesis of lipids?Read the answer and worked solution →Which animal cell organelle serves as the main microtubule organizing center?Read the answer and worked solution →What constitutes the liquid extracellular matrix in which human blood cells remain suspended?Read the answer and worked solution →

Worked practice questions

Which disease with bleeding gums did James Lind prevent using citrus fruits?

  1. Scurvy
  2. Rickets
  3. Beriberi
  4. Pellagra
Show answer and solution

Correct answer: A. Scurvy

James Lind proved that citrus foods prevent scurvy, a condition characterized by bleeding gums and poor wound healing due to collagen synthesis failure.

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In human nutrition, dietary deficiency of vitamin D is well documented to cause which bone disease?

  1. Pellagra
  2. Rickets
  3. Beriberi
  4. Scurvy
Show answer and solution

Correct answer: B. Rickets

Vitamin D deficiency causes rickets, leading to weakened and malformed bone development in children.

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The disorder beriberi is caused by a nutritional lack of which vitamin?

  1. Niacin B3
  2. Biotin B7
  3. Vitamin B1
  4. Folate B9
Show answer and solution

Correct answer: C. Vitamin B1

Polished white rice removes the outer husk containing thiamine (vitamin B1), causing beriberi among affected populations.

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