Tag: aids to health

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Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

Pencillin is given to a patient in order to

  1. Cure hereditary disease

  2. Cure all diseases

  3. Prevent any rise in bodily temperature

  4. Prevent the growth of several types of disease causing bacteria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Peptidoglycan is a major component of most bacterial cell walls. Penicillin prevents peptidoglycan from cross-linking properly in the last stages of bacterial cell wall synthesis. This greatly weakens the cell wall and causes the bacterium to lyse, or burst open, because of osmotic pressure. Penicillin is bactericidal because it directly kills bacteria. Hence, it is used to prevent the growth of disease causing bacteria.
Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

Alexander Fleming discovered penicillin in 1928, while working with

  1. Streptomyces

  2. Bacteria (Staphylococcus)

  3. Penicillium notatum

  4. P. chrysogenum
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In 1928, Alexander Fleming was investigating the properties of Staphylococci. One day, he observed that the culture of Staphylococci was contaminated with fungus and that colonies of the culture surrounding the fungus had been destroyed. 
Fleming grew the mold in a pure culture and found that it produce a substance that killed a number of disease-causing bacteria. He identified the mold (fungus) as being from the Penicillium genus and named the substance it released Penicillin. He investigated its positive antibacterial effect on many organisms and noticed that it affected bacteria such as Staphylococci and many other Gram-positive pathogens that cause scarlet fever, pneumonia, meningitis, diphtheria but not typhoid fever caused by Gram-negative bacteria.

Therefore, the correct answer is option B.

Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

Penicillin was discovered by

  1. Fleming

  2. Waksman

  3. Burkholder

  4. Dubois
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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'

Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

The fungus contaminant of Staphylococcus culture of Fleming was

  1. Aspergillus flavus

  2. Claviceps purpurea

  3. Penicillium notatum

  4. Penicillium chrysogenum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • 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.
Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

The cultures of Alexander Fleming consisted of

  1. Streptococcus

  2. Staphylococcus

  3. Bacillus

  4. Clostridium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • 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.
Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

Penicillin will be unaffective against ___________________.

  1. Mycoplasma, Slime moulds and Psedomonas

  2. Staphyloccus, Mycoplasma & Animal cell

  3. Slime moulds, Aspegillus & Psedomonas

  4. Mycoplasma, Animal cell & Slime moulds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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.

Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

Fleming discovered Penicillin from

  1. Penicillium notatum

  2. P. roqueforti

  3. P. camemberti

  4. P. chryaogenum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • 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 
Multiple choice biology aids to health antibiotics and their uses common health care methods immunization, treatment and antibiotics first aid

In 1928, a scientist discovered the first effective antibiotic. Scientist and antibiotics are

  1. Fleming - Streptomycin

  2. Fleming - Penicillin

  3. Waksman - penicillin

  4. Waksman - streptomycin.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • 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.