Biology Discoveries — Set 7

Correct Answer: A. Frederick Banting

• **Frederick Banting** = Frederick Banting, along with Charles Best, discovered insulin, a crucial treatment for diabetes. • **1921** — the year insulin was first isolated and used, transforming diabetes from a fatal to a manageable condition. • 💡 Wrong-option analysis: [Charles Best]: He was a key assistant in the discovery, but Banting is primarily credited and received the Nobel Prize; [All of the mentioned]: Incorrect, as Louis Pasteur was not involved; [Louis Pasteur]: Known for pasteurization and vaccines, not insulin discovery.

Correct Answer: D. Ronald Ross

• **Ronald Ross** = Ronald Ross discovered that mosquitoes serve as vectors, transmitting the malarial parasite to humans. • **1897** — the year Ronald Ross made his breakthrough discovery about malaria transmission, revolutionizing disease control. • 💡 Wrong-option analysis: [Edward Jenner]: Famous for developing the smallpox vaccine; [Alexander Fleming]: Discovered penicillin, the first antibiotic; [Robert Koch]: Known for identifying the causes of diseases like tuberculosis and cholera.

Correct Answer: C. Charles Darwin

• **Charles Darwin** = Charles Darwin is recognized as the father of the theory of evolution by natural selection. • **1859** — the year Darwin's seminal work 'On the Origin of Species' was published, detailing his evolutionary theory. • 💡 Wrong-option analysis: [Alfred Wallace]: Developed a similar theory of evolution independently but Darwin is more prominent; [Gregor Mendel]: Known as the father of modern genetics; [Jean-Baptiste Lamarck]: Proposed an early, incorrect theory of evolution based on acquired characteristics.

Correct Answer: D. Anton van Leeuwenhoek

• **Anton van Leeuwenhoek** = Anton van Leeuwenhoek was the first scientist to observe and accurately describe microorganisms, which he called 'animalcules'. • **17th century** — the period when Leeuwenhoek made his pioneering observations, earning him the title 'Father of Microbiology'. • 💡 Wrong-option analysis: [Louis Pasteur]: Known for pasteurization and disproving spontaneous generation; [Robert Koch]: Identified specific pathogenic bacteria and developed Koch's postulates; [Robert Hooke]: Coined the term 'cell' from observing plant tissue, not microorganisms.

Correct Answer: C. Elmer McCollum

• **Elmer McCollum** = Elmer McCollum is credited with the discovery of both Vitamin A and Vitamin D, essential nutrients for human health. • **1913** — the year McCollum discovered Vitamin A, with his later work also leading to the discovery of Vitamin D. • 💡 Wrong-option analysis: [Casimir Funk]: Coined the term 'vitamine' and theorized the existence of vitamins; [Christian Eijkman]: Showed the link between diet and beriberi, leading to the discovery of Vitamin B1; [Albert Szent-Györgyi]: Known for isolating and identifying Vitamin C.

Correct Answer: B. Jonas Salk

• **Jonas Salk** = Jonas Salk developed the first successful inactivated polio vaccine, providing a critical tool against the disease. • **1955** — the year Salk's polio vaccine was declared safe and effective, significantly reducing polio cases worldwide. • 💡 Wrong-option analysis: [Albert Sabin]: Developed the oral live-attenuated polio vaccine, which came after Salk's; [Louis Pasteur]: Known for developing the rabies and anthrax vaccines; [Edward Jenner]: Pioneer of the smallpox vaccine.

Correct Answer: D. George Palade

• **George Palade** = George Palade discovered ribosomes, identifying them as the organelles responsible for protein synthesis in cells. • **1950s** — the decade George Palade, using electron microscopy, made his groundbreaking discovery of ribosomes. • 💡 Wrong-option analysis: [Robert Hooke]: Coined the term 'cell' from observing cork; [Robert Brown]: Discovered the cell nucleus; [Christian de Duve]: Discovered lysosomes and peroxisomes.

Correct Answer: C. Christian de Duve

• **Christian de Duve** = Christian de Duve discovered lysosomes, organelles crucial for cellular waste digestion and recycling. • **1974** — the year de Duve received the Nobel Prize for his discoveries of lysosomes and peroxisomes. • 💡 Wrong-option analysis: [Albert Claude]: Pioneered methods for isolating cell components and shared the Nobel Prize with de Duve and Palade; [George Palade]: Discovered ribosomes and shared the Nobel Prize with de Duve and Claude; [Robert Hooke]: Coined the term 'cell' from observing cork.

Correct Answer: A. Camillo Golgi

• **Camillo Golgi** = Camillo Golgi discovered the Golgi complex, an organelle vital for processing and packaging proteins and lipids within cells. • **1898** — the year Camillo Golgi first identified this organelle using his innovative silver staining technique. • 💡 Wrong-option analysis: [Theodor Schwann]: Contributed to the development of the cell theory; [Robert Hooke]: Coined the term 'cell' after observing cork under a microscope; [Robert Brown]: Discovered the cell nucleus.

Correct Answer: B. Melvin Calvin

• **Melvin Calvin** = Melvin Calvin elucidated the Calvin Cycle, explaining how plants convert carbon dioxide into glucose during photosynthesis. • **1961** — the year Melvin Calvin received the Nobel Prize in Chemistry for his groundbreaking work on the pathway of carbon in photosynthesis. • 💡 Wrong-option analysis: [Hans Krebs]: Discovered the Krebs Cycle (citric acid cycle) in cellular respiration; [Robert Hill]: Identified the Hill reaction, part of the light-dependent reactions of photosynthesis; [Jan Ingenhousz]: Demonstrated that light is necessary for plants to produce oxygen.