This is a draft cheat sheet. It is a work in progress and is not finished yet.
Polynucleotides
Nucleotide is made up of |
Pentose sugar (5 Carbon Atoms) |
Nitrogen Containing Base |
A phosphate Group |
Cell Division
During Cell division DNA must make a identical copy, otherwise progeny cells will be different from parent cell. |
Complementary Base Pairs
A- Adenine |
T-Thymine |
C- Cytosine |
G-Guanine |
T-A |
C-G |
This is Base Pairing |
Semi Conservative Replication
DNA copies itself before cell division |
Each new cell has full amount of DNA |
Semi conservative replication due to half of the strands in new DNA molecule are from the original |
Daughter Helix
1 Parental Strand |
1 New Strand |
1 Unchanged from Original |
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Semi Conservative Replication Stages
Steps of DNA replication |
1) Hydrogen Bonds are broken betwen polynucleotides DNA strands |
2)Double Helix unwinds to make two single strands |
3)Original Strand acts as a template for a new strands |
3) Complementary Base pairing attracts new bases to its corresponding pairs |
4)Condensation Reactions join nucleotides together |
5) Catalysed by enzyme DNA polymerase |
6) New hydrogen bonds form |
7) New strand contains one strand from original DNA molecule and 1 new strand |
Chromosomes + DNA Replication
Chromosomes are found in the nucleus |
During Cell Division chromosomes duplicate |
DNA Replication linked to Chromosome replication linked to Mitosis |
DNA Replicated During Interphase |
Chromosomes are composed of DNA |
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