Microbiology - Microbial Recombination and Gene Transfer

Exercise :: Microbial Recombination and Gene Transfer - Section 1

  • Microbial Recombination and Gene Transfer - Section 1
21. 

When composite transposons are formed

A. a small deletion occurs in the transposase gene of an IS element
B. a small deletion occurs in the transposase gene of an IS element and plasmid is integrated
C. an IS element integrates with another IS element with the help of a plasmid
D. two IS elements integrate into a chromosome with only a small distance separating them

Answer: Option D

Explanation:

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22. 

Which of the following plamids do not possess information for self transfer to another cell?

A. Cryptic plasmids
B. Conjugative plasmids
C. Non-conjugative plasmids
D. None of these

Answer: Option C

Explanation:

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23. 

The term used for acquisition of naked DNA from its environment and its incorporation in their genome by a bacterium is

A. transformation
B. lysogenic conversion
C. conjugation
D. transduction

Answer: Option A

Explanation:

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24. 

What is term used for a bacterial cell that is able to take up naked DNA?

A. Complementary
B. Liable
C. Competent
D. Infected

Answer: Option C

Explanation:

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25. 

Penicillin resistance in staphylococci is acquired due to

A. conjugation
B. mutation
C. transformation
D. transduction

Answer: Option D

Explanation:

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