Question

7.17 E.coli was allowed to grow from Il-generation in a medium
containing "NH CI.What would be the proportions of light and
hybrid DNA molecule formed in the duration of 2hr40minute?​

Answer 1

Explanation:

E coli bacteria divides in every 20 min so in 80 min it will be four generations. 

N15 isotope is present in the environment than shifted in N14 environment, so it will result in the presence of N15 and N14 strands in DNA. 

In the second generation, half will have the previous hybrid bacteria and half will have the light bacteria. 

In the third generation, hybrid generation will again cut half, this time 25% hybrid and 75% light

In fourth generation, 16 copies will be hybrid and 14 will be light 

Answer 2

Answer:

E coli bacteria divides in every 20 min so in 80 min it will be four generations. 

E coli bacteria divides in every 20 min so in 80 min it will be four generations. N15 isotope is present in the environment than shifted in N14 environment, so it will result in the presence of N15 and N14 strands in DNA. 

E coli bacteria divides in every 20 min so in 80 min it will be four generations. N15 isotope is present in the environment than shifted in N14 environment, so it will result in the presence of N15 and N14 strands in DNA. In the second generation, half will have the previous hybrid bacteria and half will have the light bacteria. 

E coli bacteria divides in every 20 min so in 80 min it will be four generations. N15 isotope is present in the environment than shifted in N14 environment, so it will result in the presence of N15 and N14 strands in DNA. In the second generation, half will have the previous hybrid bacteria and half will have the light bacteria. In the third generation, hybrid generation will again cut half, this time 25% hybrid and 75% light

E coli bacteria divides in every 20 min so in 80 min it will be four generations. N15 isotope is present in the environment than shifted in N14 environment, so it will result in the presence of N15 and N14 strands in DNA. In the second generation, half will have the previous hybrid bacteria and half will have the light bacteria. In the third generation, hybrid generation will again cut half, this time 25% hybrid and 75% lightIn fourth generation, 16 copies will be hybrid and 14 will be light.

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