In his work with pneumonia-causing bacteria, Frederick Griffith found that a non-pathogenic strain had been transformed into a pathogenic strain. Which of the following explanations best describes the phenomenon of transformation?

AIt refers to transfer of genetic material between bacteria through direct cell to cell contact. B. It refers to introduction of genetic material into animal cells. C. It refers to genetic material taken up from the environment through bacterial cell walls.

Question

29-07-2016
Biology

Answered

In his work with pneumonia-causing bacteria, Frederick Griffith found that a non-pathogenic strain had been transformed into a pathogenic strain. Which of the following explanations best describes the phenomenon of transformation?

AIt refers to transfer of genetic material between bacteria through direct cell to cell contact. B. It refers to introduction of genetic material into animal cells. C. It refers to genetic material taken up from the environment through bacterial cell walls.

Verified Answer :

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Anonymous Anonymous · Answer 1 · 2016-08-03T10:23:52-04:00

“It refers to genetic
material taken up from the environment through bacterial cell walls” best
describes the phenomenon of transformation.

Griffith's
experiment, reported in 1928 by Frederick Griffith, was the first experiment suggesting
that bacteria are capable of transferring genetic information through a process
known as transformation. Griffith's findings were followed by research
in the late 1930s and early 40s that isolated DNA as the material that communicated this genetic information.

The correct answer between all
the choices given is the third choice or letter C. I am hoping that this answer
has satisfied your query and it will be able to help you in your endeavor, and
if you would like, feel free to ask another question.

Phoca Phoca · Answer 2 · 2019-09-23T04:50:22-04:00

Answer:

The correct answer will be option-C

Explanation:

Transformation is a process of horizontal transfer of DNA transfer in bacteria.

The process involves the uptake of the genetic material from the surrounding environment by the bacteria by becoming competent. This bacterial competency is achieved by the changes or modification in the bacterial cell wall which allow the intake of the genetic material.

The genetic material binds to the bacterial chromosome through homologous recombination.

Thus, option- C is the correct answer.