Question 241 of 455
Microbes In Human Welfare
The Greek word ‘Anti’ in antibiotic means _____.
Anti is a Greek word that means ‘against’.
Class XII · Biology practice
Microbes in Human Welfare MCQs
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455 questions in this collection · Page 25 of 46
Question 242 of 455
Microbes In Human Welfare
Antibiotics are considered ‘pro life’ with reference to human beings because they kill or retard the growth of _____.
Antibiotics are ‘against life’ (in context of disease causing organisms), but ‘pro life’ with reference to human beings. They kill or retard the growth of disease-causing microbes.
Question 243 of 455
Microbes In Human Welfare
_____ was the first antibiotic to be discovered, identified through a chance observation.
Penicillin was the first antibiotic to be discovered, and it was a chance discovery.
Question 244 of 455
Microbes In Human Welfare
Alexander Fleming discovered Penicillin while working on which type of bacteria? _____
Alexander Fleming while working on Staphylococci bacteria, once observed a mould growing.
Question 245 of 455
Microbes In Human Welfare
Penicillin was named after the mould _____.
He named it Penicillin after the mould Penicillium notatum.
Question 246 of 455
Microbes In Human Welfare
Fleming, Chain, and Florey were awarded the Nobel Prize for the discovery of Penicillin in _____.
Fleming, Chain and Florey were awarded the Nobel Prize in 1945, for this discovery.
Question 247 of 455
Microbes In Human Welfare
The fungus *Aspergillus niger* is used for the commercial production of _____ acid.
Examples of acid producers are Aspergillus niger (a fungus) of citric acid.
Question 248 of 455
Microbes In Human Welfare
The bacterium *Acetobacter aceti* is responsible for the commercial production of _____ acid.
Acetobacter aceti (a bacterium) of acetic acid.
Question 249 of 455
Microbes In Human Welfare
The bacterium *Clostridium butylicum* is used for the commercial production of _____ acid.
Clostridium butylicum (a bacterium) of butyric acid.
Question 250 of 455
Microbes In Human Welfare
The bacterium *Lactobacillus* is an example of an acid producer for _____ acid.
Lactobacillus (a bacterium) of lactic acid.
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