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
  1. J. David Robertson

  2. Danielli and Davson

  3. Singer and Nicolson

  4. Nageli and Cramer

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

They presented the most recent model of biomembrane, according to which, membranes do not have a uniform diposition of lipids and proteins, but a mosaic of two.

Multiple choice
  1. Richard P. Feynman

  2. Ed Regis

  3. K. Eric Drexler

  4. Ralph Merkle

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

Richard P. Feynman delivered his famous lecture 'There's Plenty of Room at the Bottom' at the American Physical Society meeting at Caltech (California Institute of Technology) in 1959. This lecture is widely considered the founding vision of nanotechnology, where Feynman described the possibility of manipulating individual atoms and molecules. Ed Regis wrote about nanotechnology, while Drexler and Merkle were later proponents.

Multiple choice
  1. Albert Einstein

  2. Prince Charles

  3. John Lennon

  4. E. Eric Drexler

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

Prince Charles (the Prince of Wales at the time) publicly warned about the risks of nanotechnology and the 'gray goo' scenario in 2003. His concerns, voiced during a speech at the Royal Society, contributed to public debate about nanotechnology safety and regulation. The warning drew both criticism and support from the scientific community.

Multiple choice
  1. Isaac Assimov

  2. Gregory Moss

  3. James Smith

  4. Ronald Mare

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

According to the Oxford English Dictionary, the word robotics was first used in print by Isaac Asimov in his science fiction short story "Liar!" published in May 1941 in Astounding Science Fiction.

Multiple choice
  1. Herbert Spencer

  2. G. Stanley Hall

  3. Ernst Haeckel

  4. Jean Piaget

  5. Richard Owen

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

The theory of recapitulation, often expressed in Ernst Haeckel's phrase as ontogeny recapitulates phylogeny, is a largely discredited biological hypothesis that in developing from embryo to adult, animals go through stages resembling or representing successive stages in the evolution of their remote ancestors.

Multiple choice
  1. George Mestral

  2. George Bush

  3. George Mendle

  4. George Velcro

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

In 1948 George Mestral introduced the idea of Velcro with the help of seeds.

Multiple choice
  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2

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

Statement (1) is incorrect. Dr. Hargobind Khorana was a biochemist who shared the 1968 Nobel Prize for Physiology or Medicine with Marshall W. Nirenberg and Robert W. Holley for research that helped to show how the nucleotides in nucleic acids, which carry the genetic code of the cell, control the cell's synthesis of proteins.

Statement (2) is correct. Dolly was the first cloned sheep at the Roslin Institute of Scotland who born in 1996.

Multiple choice
  1. Tansley

  2. Charles Elton

  3. Joseph Priestley and Antoine Lavoisier

  4. Carl Wilhelm Scheele

  5. Clarke

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

Carbon cycle was discovered by Joseph Priestley and Antoine Lavoisier. Later it was popularized by Humphry Davy.

Multiple choice

One of the conclusions that can be drawn from the passage is that the writer is firm in his conviction that

Directions: Answer the given question based on the following passage:


Like the geography of the planet, the human body has, until now, represented a fixed point in human experience, a ‘given’. Today we are fast approaching the day when the body can no longer be regarded as fixed. Man will be able, within a reasonably short period, to redesign not merely individual bodies, but the entire human race.
In 1962 Drs. J.D. Watson and F.H.C. Crick received the Nobel Prize for describing the DNA molecules. Since then advances in genetics have come tripping over one another at a rapid pace. Molecular biology is now about to explode from the laboratories. New genetic knowledge will permit us to tinker with human heredity and manipulate the genes to create altogether new versions of man.
One of the more fantastic possibilities is that man will be able to make biological carbon copies of himself. Through a process called ‘cloning’ it will be possible to grow from the nucleus of an adult cell a new organism that has the same genetic characteristics of the person contributing the cell nucleus. The resultant human ‘copy’ would start life with a genetic endowment identical to that of the donor, although cultural differences might thereafter alter the personality or physical development of the clone.
Cloning will make it possible for people to see themselves born anew, to fill the world with twins of themselves. Cloning would, among other things, provide us with solid empirical evidence to help us resolve, once and for all, the ancient controversy over ‘nature v nurture’ or ‘heredity v environment’. The solution of this problem, through the determination of the role played by each, would be one of the greatest milestones of human intellectual development. Whole libraries of philosophical speculation could, by a single stroke, be rendered irrelevant. An answer to this question would open the way for speedy, qualitative advances in psychology, moral philosophy and a dozen other fields.
But cloning could also create undreamed of complications for the race. There is a certain charm to the idea of Albert Einstein bequeathing copies of himself to posterity. But what of Adolf Hitler? Should there be laws to regulate cloning? Nobel Laureate Joshua Lederberg, a scientist who takes his social responsibility very seriously, believes it conceivable that those most likely to replicate themselves will be those who are most narcissistic, and that the clones they produce will also be narcissists.
Even if narcissism, however, is culturally rather than biologically transmitted, there are other eerie difficulties. Thus Lederberg raises a question as to whether human cloning, if permitted, might not ‘go critical.’ ‘I use that phrase,’ he told me, ‘in almost exactly the same sense that is involved in nuclear energy. It will go critical if there is a sufficient positive advantage to doing so....This has to do with whether the efficiency of communication, particularly along educational lines, is increased as between identical genotypes or not. The similarity of neurological hardware might make it easier for identical copies to transmit technical and other insights from one generation to the next.’

  1. cloning is going to resolve many problems of our times and that this resolution outweighs all its other possible negative impacts

  2. biologically transmitted narcissism is superior to culturally transmitted narcissism

  3. making of biological carbon copies of humans will be one of the biggest positives man should be proud of

  4. the human body can no longer be regarded as fixed

  5. it is a great idea to replicate people by way of cloning

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

(1) The writer refers to an ancient controversy of 'nature vs nurture' and 'heredity vs environment' and says cloning will provide a solid empirical evidence to resolve this controversy. Nothing beyond this. (2) On the contrary, it can be inferred from what he says that culturally transmitted narcissism is superior to biologically transmitted ones. (3) Indeed he refers to it as human intellectual development. From all that is alluded to in the passage, it cannot be seen as one of the positives. At least, that does not seem to be the thrust area of the writer. (4) In the very opening paragraph the writer says that the human body can no longer be regarded as fixed and that is what cloning has done. (5) Hardly the line of thinking of the writer. There is a clear warning about the likely pitfalls and dangers of cloning.

Multiple choice
  1. E.B. Lewis, E. Weischaus, C. Nusselein-Volhard : Genetic control of embryonic development

  2. Sydney Brenner, John E. Sulston , H. Robert Horitz : Genetic regulation of organ development and programmed cell death

  3. R. Holly, H.G. Khorana and M.W. Nirenberg : Genetic code and base sequence of t-RNA

  4. A. Korenberg and S. Ochoa : Operon model of gene control

  5. James Watson, Francis Crick and Maurice Wilkins : Double helix structure of DNA

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

The Nobel Prize in Physiology or Medicine 1959 was awarded jointly to Severo Ochoa and Arthur Kornberg for their discovery of the mechanisms in the biological synthesis of RNA and DNA. P.Jacob , J.L. Monod and A.M. Lwoff jointly received Nobel prize in 1965 for operon model of gene control.

Multiple choice
  1. J. Sumner – Crystallization of first enzyme

  2. F.A. Lipmang – Discovery of coenzyme-A and its role in metabolism

  3. E. Fischer and Krebs - Alteration of enzyme activity by phosphorylation/ dephosphorylation

  4. F. Sanger - Action of enzymes

  5. W. Arber, D. Nathans and Hamilton O. Smith – Discovery of restriction enzymes

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

The Nobel Prize in Physiology or Medicine 1931 was awarded to Otto Warburg for his discovery of the nature and mode of action of the respiratory enzyme. The Nobel Prize in Chemistry 1958 was awarded to Frederick Sanger for his work on the structure of proteins, especially that of insulin.