General Awareness Test

1683 is given as the correct answer for the discovery of bacteria. Antony van Leeuwenhoek first observed bacteria in the 1670s using microscopes, with 1683 being a commonly cited year for his bacterial observations. 1867 is too late, 1955 and 1939 are much too recent.

Christiaan Eijkman discovered that beriberi was caused by a deficiency in the diet, specifically lack of thiamine (vitamin B1), through his work with polished rice in 1897. This was a crucial discovery in understanding nutritional diseases.

Charles Darwin and Alfred Russel Wallace jointly presented their papers on natural selection to the Linnean Society in 1858. This marked the first public announcement of the theory of evolution by natural selection.

The germ theory of disease, which states that microorganisms cause many diseases, was developed by Louis Pasteur and Robert Koch in the late 1850s and 1860s. The year 1858 marks a key period in its formulation.

Charles Louis Alphonse Laveran discovered the malaria parasite in 1880 while working in Algeria. He identified the Plasmodium parasite in the blood of malaria patients, for which he later received the Nobel Prize.

Homeopathy was developed by Samuel Hahnemann, beginning around 1790. He formulated the principle of 'like cures like' and began systematic experimentation with diluted substances to treat diseases.

Sulfonamide antibiotics, the first broadly effective antibacterial drugs, were discovered by Gerhard Domagk in 1932. Prontosil, the first sulfa drug, was found to treat bacterial infections effectively.

Louis Pasteur developed pasteurization, a process of heating liquids to kill harmful microorganisms, in the 1860s. He first tested it on wine and beer in 1864-1866, and it was later applied to milk processing.

Edward Jenner developed the smallpox vaccine in 1796 after observing that milkmaids who had cowpox seemed immune to smallpox. He tested his theory by inoculating a young boy with cowpox material, establishing the principle of vaccination.

Joseph Lister pioneered antiseptic surgery in 1867, introducing the use of carbolic acid (phenol) to sterilize surgical instruments and clean wounds. This dramatically reduced infection rates and revolutionized surgical practice.

Robert Koch discovered the tuberculosis bacillus (Mycobacterium tuberculosis) in 1882, a breakthrough that established the germ theory of infectious diseases. This discovery was crucial in understanding how tuberculosis spreads and developing methods to control it.

Gregor Mendel published his groundbreaking work on inheritance in pea plants in 1866, which established the fundamental laws of heredity. His work laid the foundation for understanding genetic mutations, though the term came later.

August Weismann coined the term germplasm in the 1880s while developing his theory of heredity. His germplasm theory stated that inheritance is transmitted through a specific substance in the germ cells.