Asked in PMC Practice Test 27 (2021) 2021

Which of these processes is the means by which a material can directly uptake and incorporate foreign DNA from the environment into its genome?

Correct answer: B. Transformation

  • A. Transduction
  • B. Transformation
  • C. Binary fission
  • D. Conjugation

Explanation

Option B is correct since the transformation is the process of transmitting genetic information from one bacterium to another bacterium causing it to transform (change). Option A is incorrect since transduction is the process in which genetic material is transferred from one bacterium to another by a third party which is a bacteriophage. Option C is incorrect since binary fission is the asexual mode of reproduction of bacteria. Option D is incorrect since conjugation is the process of transfer of genetic material from one bacterium to another through a tube called the conjugation tube or cytoplasmic bridge.

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