A new DNA strand elongates only in the 5' to 3' direction because A new DNA strand elongates only in the 5' to 3' direction because replication must progress toward the replication fork. DNA polymerase can only add nucleotides to the free 3' end. DNA polymerase begins adding nucleotides at the 5' end of the template. Okazaki fragments prevent elongation in the 3' to 5' direction.

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Answer:

The correct answer will be option-DNA polymerase can only add nucleotides to the free 3' end

Explanation:

DNA replication process produces the exact copy of DNA which requires various enzymes. The function of adding a nucleotide to the daughter strand is performed by the enzyme called DNA polymerase.

The DNA polymerase enzyme catalyses the process of DNA replication which requires energy provided by the dNTP. The enzyme adds new nucleotides at 3'-OH end of the DNA which favour the reaction energetically.  

Thus, the new DNA strand appears to be elongated in the 5' to 3' direction.

DNA polymerase is the enzyme responsible for DNA replication. Elongation occurs in 5'-3' direction. The correct option is B.  DNA polymerase can only add nucleotides to the free 3' end.

What is DNA replication?

DNA replication is the process through which DNI molecule duplicates. This event takes place during the S stage of the interphase.

DNI replication is semi-conservative because each new molecule carries an original DNI strand and a new one. The original strand is used to synthesize the new complementary strand.

Several enzymes and molecules work together to achieve replication. One of them is DNA polymerase.

What is DNA polymerase?

DNA polymerase enzyme is responsible for DNA elongation by adding nucleotides to the growing chain to the 3' extreme.

It pairs the new nucleotides with the corresponding nucleotide of the original strand. Adenine pairs timine, and cytosine pairs guanine.

DNA strands are antiparallel, and replication occurs only in 5'-3' direction. So one of the strands will replicate continuously, while the other strain will be formed by short fragments known as Okazaki fragments.

The correct option is B. DNA polymerase can only add nucleotides to the free 3' end.

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