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Chapter 14: 14 (page 367)

In which direction does DNA replication take place? a. 5'-3' b. 3'-5' c. 5' d. 3'

Short Answer

Expert verified

The synthesis of DNA is always in the5'-3'. because the DNA polymerase enzyme can only add nucleotides at the end (a).

Step by step solution

01

Step:1 Introduction

Semi-conservative replication of DNA results in the formation of two daughter DNA molecules, each with a parental strand and a newly synthesized strand.

02

Step:2 Correct answer

Replication of DNA is always done in the 5'-3' orientation. As a result, option (a) is correct.

03

Sttep:3 Justification for the correct answer

Option (a) is denoted by the letter DNA polymerase is an enzyme that adds nucleotides to existing strands during 51-31 DNA replication. The activity of DNA polymerase is present. As a result, DNA polymerase adds nucleotides to the RNA primer's free hydroxyl group when the DNA template is read in the to direction. As a result, the new strand's synthesis progresses in the same direction.

04

Step:4 Explanation of incorrect answer

3'to 5'is the range for option (b). The DNA template is read in this direction, although DNA synthesis occurs in the 5'-3' direction. As a result, it is an inaccurate response.

Option (c) is denoted by the number 5'. 5'-3' is where DNA is synthesized. As a result, it is an inaccurate response.

Option (d) is denoted by the number 3'. 5'-3' is where DNA is synthesized. As a result, it is an inaccurate response.

As a result, alternatives (b), (c), and (d) are wrong.

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Most popular questions from this chapter

An adult with a history of tanning has his genome sequenced. The beginning of a protein-coding region of his DNA reads ATGGGGATATGGCAT. If the protein-coding region of a healthy adult reads ATGGGGATATGAGCAT, identify the site and type of mutation.

In which direction does DNA replication take place?

a. 5'-3'

b. 3'-5'

c. 5'

d. 3'

In eukaryotic cells, DNA and RNA synthesis occur in a separate compartment from protein synthesis. In prokaryotic cells, both processes occur together. What advantages might there be to separating the processes? What advantages might there be to having them occur together.

Explain the events taking place at the replication fork. If the gene for helicase is mutated, what part of replication will be affected?

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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