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 bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

Rh factor was discovered by

  1. Landsteiner and Weiner

  2. William Harvey

  3. Malpighi

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rh factor is an independent antigen present on the RBC irrespective of the presence of Antigen A or B. This factor is passed down from genus Rhesus macaque  (monkey) to humans and is regarded as the Rh factor it was discovered by Landsteiner and Weiner.

so, the correct answer is 'Landsteiner and Weiner'

Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

The word 'acellular' was given by

  1. Dobell

  2. H. J. clarck

  3. Leder mullar

  4. Linnaeus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Acellular word was given by Dobell and Hyman. Acellular is described as tissues or organisms that are not made up of separate cells but often have more than one nucleus and made up of proteins e.g., virus. Hence option A is correct.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

The Big Band theory of the universe was developed in $1948$ by.

  1. Hermann Bondi, Ralf Alpher, and Georg Gamow

  2. Fred Hoyle, Robert Hermann, and Thoman Gold

  3. Georg Gamow, Hermann Bondi, and Thomas Gold

  4. Georg Gamow, Ralph Alpher, and Robert Hermann
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Big Bang theory was developed by George Gamow, Ralph Alpher, and Robert Hermann, who predicted the existence of cosmic microwave background radiation.

Multiple choice business organisation functions and qualities of a manager leadership in decision-making meaning, definition and characteristics of leadership intro & meaning & importance & principles of directing

The conclusion arrived at by the University of Michigan researchers strongly favoured __________.

  1. humanistic leaders.

  2. employee-oriented leaders.

  3. production-oriented leaders.

  4. technical-oriented leaders.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The University of Michigan studies identified two styles of leadership: employee-oriented and production-oriented, and concluded that employee-oriented leaders were more effective.

Multiple choice biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

The term hormone was first introduced by

  1. Gobind khorana

  2. Baylers and Starling

  3. James waston

  4. Giulio natta
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The term hormone was first introduced by Baylers and Starling. Hormones are your body's chemical messengers. They travel in your bloodstream to tissues or organs. They work slowly, over time, and affect many different processes, including growth and development, metabolism - how your body gets energy from the foods you eat, sexual function, reproduction, mood.

Multiple choice zoology structure of chromosome, cell cycle and cell division structure of dna nucleic acid heredity and inheritance

The double-helix structure of DNA was described by

  1. Watson

  2. J.D. Watson and F. H. C. Crick

  3. Maurice Wilkins

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The structure of DNA was deciphered by Watson and Crick in 1953 on the basis of X-ray diffraction data generated by Wilkins, Astbury and Franklin. Wilkins, Watson and Crick were awarded Nobel prize for their model in 1962.
So, the correct answer is option D.

Multiple choice zoology structure of chromosome, cell cycle and cell division structure of dna nucleic acid heredity and inheritance

Information from X-ray crystallographic data collected by was used by Watson and Crick in their development of the model of DNA.

  1. Chargaff

  2. Griffith

  3. Franklin

  4. Hershey and Chase
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Although the discovery of the structure of DNA was attributed to Watson and Crick, a keynote player in helping them discover this structure was a scientist by the name of Rosalind Franklin. Rosalind Franklin, along with Francis Wilkins, worked on DNA applying X-ray crystallography to find out its structural properties. X-ray crystallography required the process of exposing a crystal specimen (DNA) to X-rays to determine the locations of the atoms in the “molecules that comprises basic unit of crystal called unit cell”. 

So, the correct option is 'Franklin'.

Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

The term parthenogenesis was coined by

  1. Grobber

  2. Balfour

  3. Boveri

  4. Owen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The term parthenogenesis was coined by Richard Owen in 1849. He defined it as a method of creating individual by single ovum. It is the development of an embryo from an unfertilised egg or if a spermatozoa does penetrate the egg, there is no union of male and female pronuclei. It is a mode of asexual reproduction. On the basis of division, it is of two types apomictic parthenogenesis and automictic parthenogenesis.
So, the correct answer is option D.
Multiple choice zoology reproduction in organisms parthenocarpic fruits parthenogenesis the life cycle of plants

The term parthenogenesis was introduced by

  1. Charles Bonnet

  2. Karl von Baer

  3. Spallanzani

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Charles Bonnet was first to introduce the term parthenogenesis. He studied the process of parthenogenesis in aphids. He kept the female aphids unfertilized in isolation and observed the development of the viable embryo from the unfertilized female eggs. 

Parthenogenesis is the development of an embryo from an unfertilized egg or if a spermatozoa does penetrate the egg, there is no union of male and female pronuclei.
So, the correct answer is option A.