Question

Why do you see two different types of replicating strands in the given DNA replication fork? Explain. Name these strands.

Answer 1

The biological process of creating two identical replicas of DNA from a single original DNA molecule is known as DNA replication. The most important aspect of biological inheritance is DNA replication, which occurs in all living species. This is required for cell division during tissue growth and repair, as well as for each new cell to receive its own copy of the DNA. Because the cell has the unique ability to divide, DNA replication is required.

Complete solution:
The leading strand is continuously synthesised and elongated during this process to reveal the template for the lagging strand (Okazaki fragments).
DNA and RNA primers are removed from the lagging strand of DNA during replication to enable Okazaki fragments to bind to it.
The lagging strand must be replicated in the opposite direction that the replication fork is moving. And DNA polymerase can only go $5'{\text{ }} - - - - > {\text{ }}3'$. As the replication fork expands, short fragments are produced.
As a result, one of the strands is referred to as a continuous strand, while the other is referred to as a discontinuous strand.

Note:
DNA replication follows a semiconservative pattern. Each of the double helix's strands serves as a template for the development of a new, complementary strand.
DNA polymerases, which involve a template and a primer (starter) and synthesize DNA in the $5' - - - - > {\text{ }}3'$ direction, create new DNA.
One new strand (the leading strand) is created as a continuous piece during DNA replication. The lagging strand, on the other hand, is made up of tiny bits.
In addition to DNA polymerase, other enzymes such as DNA primase, DNA helicase, DNA ligase, and topoisomerase are needed for DNA replication.