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Chapter 4: Problem 1

DNA replicates by which of the following models? a. conservative b. semiconservative c. dispersive d. none of the above

Short Answer

Expert verified
Answer: b. Semiconservative

Step by step solution

01

Review the different models of DNA replication

Before attempting to answer the exercise, let's briefly review each of the models of DNA replication. a. Conservative Model: In this model, the entire original (parental) double helix remains intact, and the new DNA molecule is made of all new (daughter) strands. b. Semiconservative Model: This model states that during replication, each of the two new DNA molecules consists of one parental strand and one daughter strand. c. Dispersive Model: According to this model, both parental and daughter DNA strands are interspersed along each of the two new DNA molecules after replication. d. None of the above: This option indicates that none of the above models is the correct model for DNA replication.
02

Identify the correct model

After reviewing the models of DNA replication, we can now determine the correct model. Semiconservative model is the correct one, meaning that every newly synthesized strand of DNA contains one strand from the parent molecule and one newly synthesized strand.
03

Select the correct answer

Based on our analysis, the correct model of DNA replication is: b. Semiconservative

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