a tiny fraction of these resistant cells survived with even greater resistance to radiation. Repetition of this protocol with progressively higher levels of radiation yielded a strain of E. coli that was far more resistant to radiation than the starting strain. Select the possible changes in E. coli that made them more resistant with each successive round of radiation and selection? The cells contain DNA that cannot be damaged by radiation. Mutations have resulted in more non-functional proteins. Mutations have made DNA repair more efficient. Gene duplication provided a backup for genes damaged by radiation. The cells may have gained the ability to synthesize compounds that destroy free radicals.
a tiny fraction of these resistant cells survived with even greater resistance to radiation. Repetition of this protocol with progressively higher levels of radiation yielded a strain of E. coli that was far more resistant to radiation than the starting strain. Select the possible changes in E. coli that made them more resistant with each successive round of radiation and selection? The cells contain DNA that cannot be damaged by radiation. Mutations have resulted in more non-functional proteins. Mutations have made DNA repair more efficient. Gene duplication provided a backup for genes damaged by radiation. The cells may have gained the ability to synthesize compounds that destroy free radicals.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Give typing answer with explanation and conclusion
Transcribed Image Text:Treatment of a bacterial culture (E. coli) with ionizing radiation resulted in the survival of only a tiny fraction of the cells. The
survivors proved to be more resistant to radiation than the starting cells were. When exposed to even higher levels of radiation,
a tiny fraction of these resistant cells survived with even greater resistance to radiation. Repetition of this protocol with
progressively higher levels of radiation yielded a strain of E. coli that was far more resistant to radiation than the
starting strain.
Select the possible changes in E. coli that made them more resistant with each successive round of radiation
and selection?
The cells contain DNA that cannot be damaged by radiation.
Mutations have resulted in more non-functional proteins.
Mutations have made DNA repair more efficient..
Gene duplication provided a backup for genes damaged by radiation.
The cells may have gained the ability to synthesize compounds that destroy free radicals.
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