Replication Flashcards
0
Q
What is the purpose if replication
A
Gives new cells produces in mitosis and meiosis a complete set of chromosomes (DNA)
1
Q
What is replication
A
The process of copying DNA into another molecule of DNA
2
Q
Where and when does replication occur?
A
The nucleus
The S phase of interphase in the cell cycle before mitosis
3
Q
Steps of replication
A
- DNA untwist and enzymes break the hydrogen bonds between the nitrogen bases. The DNA unzips.
- Free floating nucleotides pair with each unzipped strand following the base pairing rule
Each strand of DNA acts a template - The two identical molecules of DNA are twisted back up by enzymes
4
Q
What joins nucleotides together in replication
A
DNA polymerase
5
Q
What is the result of replication
A
Two identical copies if DNA each composed of one original and new strand
6
Q
Why is replication important
A
It occurs during interphase so that each new daughter cell will have a complete set of DNA (46 chromosomes) at the end of mitosis
