Question

Why is it important for DNA to unwind before replication?

a. to allow proteins to check for mistakes in the DNA strands
b. to improve flexibility in the DNA Strand's phosphate backbone
c. to expose bases so they can be paired with. new bases
d. to prevent the new DNA from accidentally sticking together​

Answer 1

Because to expose bases so they can be paired with new bases.

Why is unwinding important?

Because DNA unwinding is crucial for a variety of biological functions, including transcription, repair, and replication. It can result in strand separation and local melting and act as a crucial process for facilitating access to a double-stranded DNA's individual strands.

What is used to unwind DNA?

A class of molecular motors known as DNA Helicases catalyses the processive unwinding of double-stranded DNA.

What is the role of helicases?

DNA helicases are enzymes that utilize ATPs, which are energy-equivalent molecules, to unwind DNA.

Answer 2

The correct answer is c. to expose bases so they can be paired with new bases.

The DNA molecule must be unwound in order to reveal the nucleotide bases on each strand, which may subsequently be linked with new complementary bases during the DNA replication process. The unwinding process results in the formation of a replication fork, in which each strand of the DNA molecule acts as a template for the synthesis of a new complementary strand. The exposed bases on each template strand allow DNA polymerase to add complimentary nucleotides to the developing new strand.

Although proteins are important in the replication process because they ensure the correctness and integrity of the duplicated DNA, they do not necessitate the unwinding of the DNA molecule to check for errors in the DNA strands. Moreover, unwinding the DNA molecule does not increase the flexibility of the phosphate backbone of the DNA strand or prevent the new DNA from unintentionally adhering together.