1. A culture of E.coli bacteria is used to establish several subcultures. Each s
ID: 226061 • Letter: 1
Question
1. A culture of E.coli bacteria is used to establish several subcultures. Each subculture is then plated and individual colonies that grow on the agar plates are then tested for their sensitivity to the bacteriophage T1. There is a spectrum of sensitivities where some plates have a high number of resistant colonies and some plates has very few. This data supports which theory.
a.physiological adaptation theory
b.random mutation theory
c.one gene-one enzyme theory
d.wobble theory
e.none of the above
2. When considering the mutational options for a nucleotide such as guanine, there are two potential transitions and one transversion type mutations that could occur which is why we see twice the number of transitions occurring in nature.
a. true
b. false
Explanation / Answer
1. The answer is: b. Random mutation theory
Since mutations are random, some plates has more number of resistant colonies and some plates has fewer number of resistant colonies.
2. The statement is False.
Transitions are frequent than transversion because it will lead to lesser number of amino acid substitutions cases leading to silent mutation.
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