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Chapter 14: Q. 27 (page 368)

How did the scientific community learn that DNA replication takes place in a semi-conservative fashion?

Short Answer

Expert verified

The conclusion was reached because of Meselson's research with E. coli cultured in 15N.

Step by step solution

01

Introduction 

Each of the two strands that make up the double helix acts as a template from which new strands are copied during DNA replication. The parental or "old" strands will complement the new strands. The identical DNA copies that result from the formation of two daughter cells have the same sequence.

02

The explanation for the answer. 

The DNA extracted from cells cultured for two generations in 14N in Meselson's research with E. coli created two bands: one band was at the intersection of 15N and 14N, while the other band matched the band of 14N DNA. Only a semi-conservative replication of DNA may account for these findings. The other two models were consequently eliminated as a result of this.

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Most popular questions from this chapter

Which of the following does the enzyme primase synthesize? a. DNA primer b. RNA primer c. Okazaki fragments d. phosphodiester linkage

The ends of the linear chromosomes are maintained by

a. helicase

b. primase

c. DNA pol

d. telomerase

How do the linear chromosomes in eukaryotes ensure that its ends are replicated completely?

Provide a brief summary of the Sanger sequencing method.

If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of C?

a. 27 percent

b. 30 percent

c. 23 percent

d. 54 percent
See all solutions

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