DNA Replication (Leaving Cert Biology): Flashcards
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What is DNA replication?
What is DNA replication?
Process of making an exact copy of DNA
Result of DNA replication
Result of DNA replication
Two identical DNA molecules from one original
DNA amount after replication
DNA amount after replication
Twice the amount of DNA
Location of DNA replication
Location of DNA replication
Nucleus
When does DNA replication occur?
When does DNA replication occur?
When cell is not actively dividing
What is chromatin?
What is chromatin?
Long, thin fibres of DNA when cell not dividing
Semi-conservative replication
Semi-conservative replication
Each new DNA has one original & one new strand
First step of DNA replication
First step of DNA replication
DNA double helix unwinds and uncoils
Second step of DNA replication
Second step of DNA replication
Enzyme breaks bonds between bases, strands separate
Base that pairs with Adenine (A)
Base that pairs with Adenine (A)
Thymine (T)
Base that pairs with Guanine (G)
Base that pairs with Guanine (G)
Cytosine (C)
DNA polymerase function
DNA polymerase function
Enzyme that joins nucleotides to form new DNA strands
Composition of new DNA molecule
Composition of new DNA molecule
Half original DNA and half new DNA
Template in DNA replication
Template in DNA replication
Original strand determines sequence of new strand