Biology Discoveries — Set 1
Inventions · जीवविज्ञान की खोजें · Questions 1–10 of 70
Who is credited with the discovery of the first antibiotic, Penicillin?
Correct Answer: C. Alexander Fleming
• **Alexander Fleming** = He discovered the first antibiotic, Penicillin, in 1928. • **1928** — This year marks the discovery of penicillin, a major breakthrough in medicine. • 💡 Wrong-option analysis: Edward Jenner: discovered the smallpox vaccine; Louis Pasteur: known for pasteurization and germ theory; Robert Koch: identified causative agents for TB and cholera.
Which scientist is known for discovering the structure of the DNA double helix alongside Francis Crick?
Correct Answer: D. James Watson
• **James Watson** = He, along with Francis Crick, discovered the DNA double helix structure. • **1953** — The year Watson and Crick published their groundbreaking model of DNA. • 💡 Wrong-option analysis: Charles Darwin: developed the theory of evolution by natural selection; Gregor Mendel: known as the 'Father of Genetics' for his work on inheritance; Linus Pauling: proposed an incorrect triple helix model for DNA and made significant contributions to chemistry.
Who discovered the existence of blood groups (A, B, O) in the human body?
Correct Answer: C. Karl Landsteiner
• **Karl Landsteiner** = He identified the main human blood groups (A, B, O), enabling safe blood transfusions. • **1900** — The year Karl Landsteiner discovered the ABO blood group system. • 💡 Wrong-option analysis: William Harvey: discovered the circulation of blood; Joseph Lister: pioneered antiseptic surgery; Alexis Carrel: known for vascular surgery and organ transplantation.
Who is considered the 'Father of Genetics' for his work on pea plants?
Correct Answer: C. Gregor Mendel
• **Gregor Mendel** = He is known as the 'Father of Genetics' for his fundamental work on inheritance using pea plants. • **Early 20th century** — The period when Mendel's work was rediscovered, gaining recognition after decades. • 💡 Wrong-option analysis: Hugo de Vries: one of the scientists who rediscovered Mendel's laws; Thomas Morgan: established the chromosome theory of inheritance using fruit flies; Charles Darwin: developed the theory of evolution by natural selection.
The discovery of the process of 'Pasteurization' is attributed to?
Correct Answer: C. Louis Pasteur
• **Louis Pasteur** = He developed the process of pasteurization to kill harmful microbes in food and beverages. • **Germ theory** — Pasteur's work was instrumental in proving that microorganisms cause disease, a cornerstone of modern medicine. • 💡 Wrong-option analysis: Robert Koch: identified specific bacteria causing diseases like TB and cholera; Antonie van Leeuwenhoek: first observed and described single-celled organisms; Joseph Priestley: discovered oxygen and other gases.
Who was the first person to observe and describe a living cell using a microscope?
Correct Answer: B. Antonie van Leeuwenhoek
• **Antonie van Leeuwenhoek** = He was the first to observe and accurately describe living single-celled organisms, which he called 'animalcules'. • **'Animalcules'** — The term Leeuwenhoek used to describe the microscopic life forms he observed. • 💡 Wrong-option analysis: Robert Hooke: coined the term 'cell' by observing dead cork cells; Matthias Schleiden: proposed that all plants are made of cells; Theodor Schwann: proposed that all animals are made of cells.
Which scientist discovered the circulation of blood in the human body?
Correct Answer: B. William Harvey
• **William Harvey** = He discovered and described the complete circulation of blood in the human body. • **1628** — The year Harvey published 'Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus', detailing blood circulation. • 💡 Wrong-option analysis: Andreas Vesalius: a pioneer in human anatomy, wrote 'De humani corporis fabrica'; Hippocrates: known as the 'Father of Medicine' in ancient Greece; Galen: an influential ancient Greek physician whose anatomical theories were largely overturned by Harvey.
Who developed the first successful smallpox vaccine in 1796?
Correct Answer: D. Edward Jenner
• **Edward Jenner** = He developed the first successful smallpox vaccine using cowpox material. • **1796** — The year Edward Jenner performed his groundbreaking experiment, leading to the smallpox vaccine. • 💡 Wrong-option analysis: Albert Sabin: developed the oral polio vaccine; Louis Pasteur: known for pasteurization and rabies vaccine; Jonas Salk: developed the first injectable polio vaccine.
Who is known for discovering the bacteria that causes Tuberculosis (TB) and Cholera?
Correct Answer: C. Robert Koch
• **Robert Koch** = He discovered the bacteria responsible for causing tuberculosis and cholera. • **Koch's Postulates** — A set of four criteria established by Koch to confirm a specific microbe causes a specific disease. • 💡 Wrong-option analysis: Ronald Ross: discovered the transmission of malaria by mosquitoes; Joseph Lister: pioneered antiseptic surgery; Alexander Fleming: discovered penicillin.
Who coined the term 'Cell' while observing a thin slice of cork under a microscope?
Correct Answer: B. Robert Hooke
• **Robert Hooke** = He coined the term 'cell' in **1665** after observing the microscopic structure of cork. • **1665** — The year Robert Hooke first used the word 'cell' in his book 'Micrographia'. • 💡 Wrong-option analysis: Robert Brown: discovered the nucleus in plant cells; Theodor Schwann: concluded that all animals are composed of cells; Rudolf Virchow: famous for the maxim 'Omnis cellula e cellula' (all cells arise from pre-existing cells).