Home
Class 12
BIOLOGY
The DNA extraction was done from an E. C...

The DNA extraction was done from an E. Coli culture, 60 min after its transfer from 15_N to 14_N medium. What will be the fraction of hybrid DNA in the total extracted DNA ?

A

`1/4`

B

`1/8`

C

`1/2`

D

`1/16`

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Go though the following statements (i) Meselson & stahl used cesium chloride density gradient to distinguish heavy DNA molecules from the normal DNA molecules. (ii) In meselson & Stahl experiment the DNA that was extracted from the culture one generation after the transfer from .^(15)N to .^(14)N , was composed of equal amount of hybrid (intermediate) DNA and of light DNA. (iii) In prokaryotes, control f the rate of transcriptional initiation is the predominant site for control of gene expression. (iv) In lac operon, the repressor is synthesised only at the time when the level of metabolite is in excess. Find out the correct statements?

In E. coli DNA has 18% of bases of cytosine. What will be the fraction of adenine?

DNA was extracted from E.coli. The proportion of cytosine was found to be 30%, then what will be the amount of adenine?

E.coli with dsDNA labeled with radioactive thymidine, allowed to replicates in a simple nutrient medium for two - generation. What will be the percentage of bacteria containing only non-radioactive DNA ?

The extraction of DNA fragment from agarose gel is called_______ .

The technique of extraction of DNA fragments from the gel is called:

Bacteria were grown in a medium containing heavy isotope of nitrogen (N^(15)) for many generations and all their DNA contained many heavy nitrogen only. A bacterium of this type was transferred to nomal medium and allowed to duplicate . After two divisions of heavy DNA is likely to be that

Escherichia coli, in which both the strands of DNA are labelled with .^(15)N , is transferred to .^(14)N medium and allowed to replicate for two generations. Find out the number of hybrid DNA molecues in the second generation

A normal DNA molecule is continuously replicate in N^(15) medium than what is the % of lighter DNA in 4^(th) generation.