scientist, discoveries & inventions MCQ section 4 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general awareness mcq - 4 EXERCISES
The following question based on scientist, discoveries & inventions topic of general awareness mcq
(a) Morgan
(b) Waldeyer
(c) Johannsen
(d) Mendel
The correct answers to the above question in:
Answer: (c)
Though Gregor Mendel (1822–1884) first suggested the existence of discrete inheritable units, he did not use the term gene.
Gene was coined in 1909 by Danish botanist Wilhelm Johannsen to describe the fundamental physical and functional unit of heredity. The related word genetics was first used by William Bateson in 1905.
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Read more scientist discoveries and inventions Based General Awareness Questions and Answers
Question : 1
The Beaufort scale is used to measure :
a) Intensity of earthquakes
b) Atmospheric pressure
c) Wind velocity
d) Altitudes of mountains
Answer »Answer: (c)
The Beaufort scale is an empirical measure for describing wind velocity based on observed sea conditions. The scale was devised in 1805 by Irish-born Francis Beaufort (later Rear Admiral Sir Francis Beaufort), a Royal Navy officer, while serving in HMS Woolwich.
Question : 2
Who discovered cement?
a) Janseen
b) Agassit
c) Joseph Aspdin
d) Albertus Magnus
Answer »Answer: (c)
Cement is a binder, a substance that sets and hardens independently, and can bind other materials together.
The word “cement” traces to the Romans, who used the term opus caementicium to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as a binder.
Joseph Aspdin was a British cement manufacturer who obtained the patent for Portland cement on 21 October 1824.
Question : 3
IVF (In Vitro Fertilization) Technique was first devised by
a) Dr. Martin Cooper
b) Patrick Steptoe and Robert Edwards
c) Robertson
d) Dr. Henry Dixon
Answer »Answer: (b)
Along with the surgeon Patrick Steptoe, Robert Edwards successfully pioneered conception through IVF, which led to the birth of Louise Brown in 1978. They founded the first IVF program for infertile patients and trained other scientists in their techniques.
Question : 4
Blood groups were discovered by
a) Morgan
b) Landsteiner
c) Weismann
d) William Harvey
Answer »Answer: (b)
The ABO blood group system is widely credited to have been discovered by the Austrian scientist Karl Landsteiner, who identified the O, A, and B blood types in 1900. He was awarded the Nobel Prize in Physiology or Medicine in 1930 for his work.
Question : 5
Reserve transcription was discovered by :
a) har Govind Khorana
b) Beadle & Tatum
c) Temin & Baltimore
d) Waston & Crick
Answer »Answer: (c)
In 1970, American virologists Howard Martin Temin and David Baltimore along with Japanese virologist Satoshi Mizutani, working independently, reported the discovery of an enzyme that could synthesize proviral DNA from the RNA genome of RSV.
This enzyme was named RNA-directed DNA polymerase, commonly referred to as reverse transcriptase.
Question : 6
Trie concept of “Green House Gases” was postulated by
a) Richael Carlson
b) Joseph Furier
c) M. S. Swaminathan
d) Abdui Kalam
Answer »Answer: (b)
The theory that gases in the atmosphere might increase Planet Earth’s temperature was first postulated by Joseph Fourier in 1827, a scientist who also seems to have coined the term “greenhouse gases.”
But it wasn’t until 1896 that a research chemist by the name of Svante Arrhenius quantified the greenhouse gas theory and apparently coined the term “greenhouse effect.”
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