E connect instructions I help homework 21 Question 11 (of 19) Save & Ext Submit

Question

E connect instructions I help homework 21 Question 11 (of 19) Save & Ext Submit 1.05 points Altering the Meselson-Stahl experiment, pt. 1 You decide to repeat the Meselson-Stahl experiment, except this time you plan to grow the E. colf cells on light N medium for many generations and then transfer them to heavy 15N medium and allow them to grow for 2 additional generations (2 rounds of DNA replication). If the semiconservative model of DNA replication is correct, what is the expected distribution of DNA in the density gradient after one round of replication? O A single band of intermediate density O A single band of light density. O A single band of heavy density O One band of light density and one band of heavy density One band of light density and one band of intermediate density References eBook& Resources Multiple Choice Atering the Meselson-Stah xperiment, pt 12

Explanation / Answer

Answer - A single band of intermediate density.

It grows on N14 medium light density so both strand has N14 nitrogen.
Then transfer to N15 medium high density. Here they told one round of replication.
So, the N14 strand opens and done replication in N15 medium. So, N14-N15 hybrid form in one round of replication.

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