Tag: first aid

Penicillin is a group of antibiotics derived from Penicillium fungi. The discovery of penicillin is attributed to Alexander Flemming in 1928.
Salman Waksman discovered streptomycin
Burkholder discovered Pfiesteria, which is a genus of heterotrophic dinoflagellates
Eugene Dubois was the first person to ever deliberately search for fossils of human ancestors
So, the correct answer is 'Fleming'

Selman Waksman, the microbiologist who discovered streptomycin, first used the word "antibiotic" in 1943. 

• Alexander Fleming was working on a Bacterial culture of Staphylococcus to studying the action of lysozyme and its role in the fighting of the infection.
• While he was working with the culture he noticed that the bacterial culture's growth is inhibited due to the growth of fungal infection on it.
• The fungus that infected the culture was  Penicillium notatum , whose secretion was later to be discovered as antibiotic penicillin.
  
• So the answer Penicillium notatum is correct.
  

• Alexander Fleming was working with a bacteria to study the action of lysozyme and its role in the fighting of the infection in the human body.
• The bacterial culture that he was working on was of Staphylococcus 
• Due to some fault, the bacterial culture Fleming was working on developed a fungal infection of Penicillium notatum which inhabited the growth of the bacteria in the culture.
• The secretion which was released by the fungus was called mold juice by Fleming but later he named it as penicillin after the name of the organism which secretes it.
• So the answer Staphylococcus is correct.
  

Penicillin targets the synthesis of peptidoglycan in bacterial cell walls. Mycoplasma lacks a cell wall, slime molds are eukaryotes, and Pseudomonas has a different cell wall structure/permeability, making them resistant to penicillin.

• Discovery of penicillin antibiotic by Fleming was an accidental discovery.
• Fleming was working with different bacterial strains to study the effect of lysozyme in fighting of bacterial infection in human body.
• In his lab there were many petri dish containing different strains of bacteria, he observed that one of the petridishes containing the strain for bacteria  Staphylococcus was infected by the growth of a fungus
• This fungus growing along with the bacterial colony inhibited the growth of the bacterial colony
• On further observation Fleming saw that the chemical substances secreted by the mold inhibited the bacterial growth. He named it Penicillin after the name of the organism ie Penicillium notatum
• So, the correct answer is Penicillium notatum 
  

• In September 1928 when Alexander Fleming observed his Petri dishes of the bacterial culture he notice that the culture of bacteria Staphylococcus has a mold growing over it which has inhabited its growth in that area.
• Upon observing he found that the mold was a strain of fungus Penicillium notaum and its was secreting some substance which inhibited the growth of the bacteria.
• He named it penicillin after the organism from which it is secreted.
• So the answer Alexander Fleming who discovered the first antibiotic penicillin is correct.
  

While Alexander Fleming discovered penicillin, Howard Florey and Ernest Chain were responsible for isolating and purifying it, and demonstrating its clinical potential as an effective drug.

The discovery of Penicillin was a case of serendipity and it was observed on a culture plate of Staphylococcus aureus that was contaminated by a fungus species. 

• Sutton deduced that chromosomes are the basis of heredity and that the reduction of chromosomes in meiosis is directly related to Mendel's laws of inheritance.
• Thomas Hunt Morgan described the phenomenon of linkage and crossing over. Morgan imagined that genes on chromosomes were similar to pearls on a string, in other words, they were physical objects. The closer two genes were to one another on a chromosome, the greater their chance of being inherited together. In contrast, genes located farther away from one another on the same chromosome were more likely to be separated during recombination. Therefore, Morgan correctly proposed that the strength of linkage between two genes depends upon the distance between the genes on the chromosome. This proposition became the basis for construction of the earliest maps of the human genome.
• James Dewey Watson discovered the structure of DNA in 1953 with Francis Crick.
• Scottish bacteriologist Alexander Fleming accidentally discovered the antibiotic in 1928, when he came back from a vacation and found that a green mold called Penicillium notatum had contaminated Petri dishes in his lab and were killing some of the bacteria he’d been growing.