The assertion that “life only comes from life” was stated by Louis Pasteur in regard to his experiments that definitively refuted the theory of spontaneous generation.
Missing Words
spontaneous, generation
Louis Pasteur's experiments with swan-necked flasks demonstrated that microorganisms do not spontaneously arise from non-living matter. This definitively refuted the theory of spontaneous generation, supporting the principle of biogenesis (life comes from life).
Question 2
John Snow is known as the Father of epidemiology.
Missing Word
epidemiology
John Snow is considered the Father of Epidemiology for his work during the 1854 cholera outbreak in London. He meticulously mapped the cases and traced the source of the outbreak to a contaminated water pump, demonstrating the importance of epidemiological investigation in controlling disease.
Question 3
The miasma theory states that disease may originate from proximity to decomposing matter and is not due to person-to-person contact.
Missing Word
miasma
The miasma theory, prevalent before germ theory, proposed that diseases arose from 'bad air' emanating from decaying organic matter, not direct contact. This contrasts with the modern understanding of infectious disease transmission via microorganisms.
Question 4
The scientist who first described cells was Robert Hooke.
Missing Words
Robert, Hooke
Robert Hooke, using an early microscope, observed and coined the term 'cells' when describing the structure of cork in 1665. His observations marked a pivotal moment in the development of cell theory.
Question 5
Prokaryotic cells that are rod-shaped are called bacilli.
Missing Word
bacilli
Bacilli are a specific morphological classification for rod-shaped bacteria. Understanding bacterial morphology is crucial for identification and classification of prokaryotic organisms.
Question 6
The type of inclusion containing polymerized inorganic phosphate is called volutin (or metachromatic granule).
Missing Word
volutin (or metachromatic granule)
Volutin, also known as metachromatic granules, are inclusions that store polymerized inorganic phosphate. These granules are characteristic of certain microorganisms and can be used for identification purposes.
Question 7
Peroxisomes typically produce hydrogen peroxide, a harsh chemical that helps break down molecules.
Missing Words
hydrogen, peroxide
Peroxisomes are eukaryotic organelles involved in lipid metabolism and detoxification, producing hydrogen peroxide as a byproduct. Catalase within the peroxisome then breaks down the toxic hydrogen peroxide into water and oxygen.
Question 8
Microfilaments are composed of actin monomers.
Missing Word
actin
Microfilaments, a key component of the eukaryotic cytoskeleton, are polymers of the protein actin. They play a crucial role in cell shape, movement, and division.