Kingdom Monera Kingdom Protista - Questions & Answers | Exam2Win

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361. The bacterium which reduces the fertility of soil is

A. Nitrosomonas

B. Bacillus denitrificans

C. Azotobacter sp.

D. Nitrobacter

Explanation:

362. Bacteria are thought to be primitive organisms because they

A. Are small, microscopic plants, which cannot be seen by naked eye

B. Cause serious diseases in human beings, domesticated animals and crop plants

C. Produce endospores which are very resistant to adverse conditions

D. Possess incipient nucleus and show division similar to amitosis

Explanation:

363. Which of the following is not true of Escherichia coli?

A. Gene recombination can occur through transformation, transduction and conjugation

B. It occurs in human intestine

C. It lacks true nucleus

D. It is diploid

Explanation:

364. During bacterial conjugation there is usually

A. Mutual and complete exchange of genetic material between two conjugants

B. Complete transfer of genetic material from one conjugant to the other

C. Only a partial transfer of genetic material from one conjugant to the other

D. A partial but material exchange of genetic material between the conjugants

Explanation:

365. Nitrifying bacteria convert the

A. Nitrates into nitrites

B. Nitrites into nitrates

C. Ammonium salts into nitrates

D. Ammonium salts into amino acids

Explanation: