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Microbes in Human Welfare MCQs
Class XII Biology
•
NCERT Based
•
NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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455 questions in this chapter
Question 321 of 455
📘 CLASS XII
The term for 'life' in the context of antibiotic is the Greek word _____.
Anti is a Greek word that means ‘against’, and bio means ‘life’.
Question 322 of 455
📘 CLASS XII
Penicillin was named after the mould Penicillium _____.
He named it Penicillin after the mould Penicillium notatum.
Question 323 of 455
📘 CLASS XII
Antibiotics were extensively used to treat soldiers wounded in _____.
This antibiotic was extensively used to treat American soldiers wounded in World War II.
Question 324 of 455
📘 CLASS XII
Microbes are used for commercial production of certain chemicals like organic acids, alcohols and _____.
Microbes are also used for commercial and industrial production of certain chemicals like organic acids, alcohols and enzymes.
Question 325 of 455
📘 CLASS XII
Pectinases and proteases clarify bottled fruit juices by breaking down pectin and _____.
Proteases digest proteins (implied by the function of proteases used for clarification).
Question 326 of 455
📘 CLASS XII
Cyclosporin A is used specifically as an _____ agent in organ-transplant patients.
Cyclosporin A... is used as an immunosuppressive agent in organ-transplant patients.
Question 327 of 455
📘 CLASS XII
A major component of municipal waste water (sewage) is _____.
A major component of this waste water is human excreta.
Question 328 of 455
📘 CLASS XII
Grit (soil and small pebbles) are removed during primary treatment by _____.
Then the grit (soil and small pebbles) are removed by sedimentation.
Question 329 of 455
📘 CLASS XII
The supernatant that moves from the primary settling tank to secondary treatment is called the _____.
All solids that settle form the primary sludge, and the supernatant forms the effluent.
Question 330 of 455
📘 CLASS XII
Flocs are mesh-like structures formed by masses of bacteria associated with _____ filaments.
Flocs (masses of bacteria associated with fungal filaments to form mesh like structures).
