Question 241 of 455
The Greek word ‘Anti’ in antibiotic means _____.
Anti is a Greek word that means ‘against’.
Microbes in Human Welfare MCQs
Class XII Biology • NCERT Based • NEET Practice
Question 242 of 455
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
_____ 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
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
Penicillin was named after the mould _____.
He named it Penicillin after the mould Penicillium notatum.
Question 246 of 455
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
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
The bacterium *Acetobacter aceti* is responsible for the commercial production of _____ acid.
Acetobacter aceti (a bacterium) of acetic acid.
Question 249 of 455
The bacterium *Clostridium butylicum* is used for the commercial production of _____ acid.
Clostridium butylicum (a bacterium) of butyric acid.
Question 250 of 455
The bacterium *Lactobacillus* is an example of an acid producer for _____ acid.
Lactobacillus (a bacterium) of lactic acid.