Class XII · Biology practice

Microbes in Human Welfare MCQs

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455 questions in this collection · Page 33 of 46

Question 321 of 455

📘 CLASS XII

Microbes In Human Welfare

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

Microbes In Human Welfare

Penicillin was named after the mould Penicillium _____.

He named it Penicillin after the mould Penicillium notatum.

Question 323 of 455

📘 CLASS XII

Microbes In Human Welfare

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 In Human Welfare

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

Microbes In Human Welfare

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

Microbes In Human Welfare

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

Microbes In Human Welfare

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

Microbes In Human Welfare

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

Microbes In Human Welfare

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

Microbes In Human Welfare

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).

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