General Awareness · Science General

Inventors and Scientific Discoveries

4,616 Questions

This hub provides questions related to great inventors and their scientific discoveries. It covers the inventors of the telephone, radio, and microchips, alongside Nobel Prize winners. These facts are crucial for the general awareness section of major competitive exams.

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Inventors and Scientific Discoveries Questions

Multiple choice biology structural organization in living organisms tissues of plants levels of organisation in plants kinds of plant tissue

The term meristem was coined by

  1. Hanstein

  2. Nageli

  3. Schmidt

  4. Esau

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The term meristem was first coined by a  Swiss botanist Carl Wilhelm von Nägeli in 1858
  • The term meristem was mentioned in his book "Contributions to Scientific Botany"
  • It is derived from the Greek word 'merizein' which means 'to divide'
So, the correct answer is 'Nageli'
Multiple choice biology classification and variation dna - history and structure biotechnology commercial applications of biotechnology

Interferons were discovered by

  1. Zinder and Lederberg

  2. Isaac and Lindemann

  3. Temin

  4. Safferman and Morris

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The first interferon was discovered in 1957 by Alick Isaacs and Jean Lindenmann. During their investigation, the two scientists found that virus-infected cells secrete a special protein that causes both infected and noninfected cells to produce other proteins that prevent viruses from replicating. Hence interferons were discovered by Isaac and Lindemann.
  • So, the correct answer is 'Isaac and Lindemann'.
Multiple choice evs - i clothes - our necessity applications of insulation uses of good and poor conductors in daily life voyages and discoveries

Who invented the ''power loom''?

  1. Cartwright

  2. Elias Howe

  3. Whitney

  4. John Kay

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The power loom was invented by Edmund Cartwright in 1785 and set up a factory in Doncaster, England to manufacture cloth. The power loom was a steam powered mechanically operated version of a regular loom, an invention that combined threads to make cloth.

Multiple choice evs - i clothes - our necessity applications of insulation uses of good and poor conductors in daily life voyages and discoveries

Who invented the ''Spinning Mule''?

  1. John Kay

  2. James Hargreaves

  3. Samuel Crompton

  4. Elias Howe

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Samuel Crompton was a mill worker who had learnt to spin using a Spinning Jenny. He noted that one of the problems with the Spinning Jenny was that the thread was not strong enough and it kept breaking. In 1779, Crompton designed a new machine which he called the Spinning Mule. His machine combined the best features of both the Spinning Jenny and Arkwright's Water Frame. The Spinning Mule produced a very fine and even thread which was suitable to spin yarns for making muslin.

Multiple choice evs - i clothes - our necessity applications of insulation uses of good and poor conductors in daily life voyages and discoveries

Who invented the sewing machine?

  1. Samuel Crompton

  2. Elias Howe

  3. Eli Whitney

  4. Richard Arwright

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Elias Howe's invention of sewing machine revolutionized the entire textile industry. Introduction of sewing machine in England was instrumental in achieving rapid industrialization and associated technological  innovations. Although Howe personally could not make the most out of his invention at first instance, after extensive patent litigation he got the rewards. 

Multiple choice physics electromagnetic forces magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop oersted experiment oersted's experiment magnetic field due to a straight current carrying conductor

Who first discovered the relationship between electricity and magnetism?

  1. Faraday

  2. Newton

  3. Maxwell

  4. Oersted

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oersted discovered the relationship between electricity and magnetism.

Multiple choice animal diseases economic importance of bacteria and fungi bacteria keeping diseases away biology

Which famous biologist attenuated. the germs of anthrax disease by heating them and inoculated sheep with them, thus making the sheep resistant to anthrax? 

  1. Lazaro Spailanzani

  2. Louis Pasteur

  3. Joseph Lister

  4. Francesco Redi

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pasteur discovered that growing anthrax bacilli at about 42 °C made them unable to produce spores.  . His laboratory notebooks, now  show that he actually used heat and potassium dichromate similar to Toussaint's method, followed by inoculation of the tested animals with the weakened innoculum. The experiment, conducted  by him at Pouilly-le-Fort on sheep, goats and cows, was successful.

So, the correct answer is B. (Louis pasteur )

Multiple choice evs water: a precious resource importance of water let's play with water water and its properties water resources and conservation

The discovery of the fact that oxygen and hydrogen combine to form water, was a major step in the development of science. Who made this discovery?

  1. Carl Wilhelm Scheele

  2. Isaac Newton

  3. Joseph Priestley

  4. Henry Cavendish

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
It was the chemist Henry Cavendish (1731 – 1810), who discovered the composition of water when he experimented with hydrogen and oxygen and mixed these elements together to create an explosion (oxyhydrogen effect). In 1811, the Italian physician Amadeo Avogadro finally found the ${H} _{2}O$ formula for water.
Multiple choice zoology micro - organisms: a wonderful world commercial use of microorganism microbes in household and industry microbial products - food, medicines and industrial products

The germ theory of diseases was established by

  1. Louis Pasteur

  2. Robert Koch

  3. Lister

  4. Alexander Fleming

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Louis Pasteur proposed the germ theory of disease. This theory explains that the disease is caused by the microorganisms which cannot be seen by naked eyes. These are small and microscopic organisms. These organisms are dependent on the host for activities like growth. He demonstrated that fermentation is the result of the action of microorganism on sugar. 

Thus, the correct answer is 'Louis Pasteur'.

Multiple choice hmp shunt alternative to glycolysis carbohydrate metabolism respiration bio-chemistry

HMP shunt was discovered by 

  1. Horecker and coworkers

  2. Warburg and Dickens

  3. Blackman

  4. M.Calvin

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hexose Monophosphate Pathway (HMP) is an alternative pathway of glucose break down found in animal tissues like liver, mammary glands, adrenal cortex, leucocytes and in many plant tissues. The pathway was first discovered by Warburg et. at. (1953) and Dickens (1938).

So, the correct answer is option B.

Multiple choice bio-chemistry respiration in organisms glucose metabolism the need for energy in living organism respiratory function

Match the scientist and their discoveries given in Column I and II correctly and choose the correct combination from the following.

   List I    List II
 A  P Mitchell  p  Pentose phosphate pathway
 B  Warberg and Dickens  q  Chemiosmotic mechanism
 C  EMP pathway  r  Embden-Meyerhof and Parnas
 D  Anaerobic respiration  s  Pasteur
     t  Kostychev
  1. A- p, B- q, C- r, D- t

  2. A- q, B- p, C- s, D- t

  3. A- q B- p, C- r, D- t

  4. A- q, B- p, C- t, D- s

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Peter Dennis Mitchell was a British biochemist, who was awarded the 1978 Nobel prize for chemistry for his discovery of the 'chemiosmotic mechanism' of ATP synthesis.
Pentose phosphate pathway was discovered by Warburg and Dickens. It is a
 pathway of hexose oxidation in which glucose-6-phosphate undergoes two successive oxidations by NADP, the final one being oxidative decarboxylation to form a pentose phosphate.
EMP pathway is known as 'Embden-Meyerhof-Parnas pathway'. It is also called as glycolysis. It converts glucose to pyruvate.
Kostychev was first Russian scientist to explain anaerobic respiration. He applied his knowledge of microbiology to the study of the decomposition of organic matter in the soil. Thus, the correct answer is option C.