DNA replication

Question 1

When and why does this process occur in the cells?

Answer 1

DNA has to be copied before a cell divides as new cells will need DNA that is identical to DNA in their parent cells.

s phase

This process occurs in the nucleus

Question 2

Identify the role of helicase and DNA polymerase

Answer 2

HELICASE:
Cuts up the hidrogen bonds. between the nitrogen base pairs.

Both strands will serve as templates for the new daughter strands.

DNA POLYMERASE: The enzyme DNA polymerase joins adjacent nucleotides to form new sugar-phosphate backbones resulting in two identical DNA molecules.

Question 3

Explain the term semi semi-conservative. draw diagram

Answer 3

DNA replication creates two identical DNA molecules, each with one strand from the original DNA and one newly synthesized strand.

The process is described as semi-conservative replication as it produces two “half-old and half-new” DNA strands. . summarise this further and simply. Be able to draw a daigram

Question 4

what is produced at the end of the process of DNA replication

Answer 4

At the end of DNA replication, two identical DNA molecules are produced, each consisting of one original strand and one newly synthesized strand.

Question 5

What is produced at the end of the process of DNA replication?

Answer 5

two identical DNA molecules are produced. Each of these molecules consists of one original (parental) strand and one newly synthesized strand

Question 6

What happens if errors occur in the process?