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Title: AQA AS BIOLOGY NUCLEIC ACIDS AND DNA REPLICATION
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.
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DNA:
RNA:
The carbon atoms in the pentose molecule are numbered:
Double Helix Structure
Single Stranded
3’ (3-prime) and 5’ (5-prime)
Carries genetic information
Short chain
The 5’ carbon has an attached phosphate group while the 3’ has a hydroxyl group
...
Made up of nucleotides
A/U/C/G
Deoxyribose Sugar
A/T/C/G
Complementary
Bases:
DNA:
Adenine (A)
A ===== T
Thymine (T)
C ===== G
RNA:
Nucleic Acids
A ===== U
C ===== G
Guanine (G)
Cytosine (C)
Uracil (U)
DNA is the hereditary material responsible for
passing genetic info from cell to cell
...
Nitrogen containing
base
Phosphate group
Nuclear Division—the process by
which the nucleus divides ( two
types: mitosis and meiosis)
Cytokinesis—follows nuclear division—where the whole cell divides
...
One
new molecule would be entirely
the original DNA and the other an
entirely new molecule
...
DNA Replication
1
...
2
...
3
...
4
...
5
...
Title: AQA AS BIOLOGY NUCLEIC ACIDS AND DNA REPLICATION
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.
Description: Detailed first year (AS) biology notes to aid key revision of topics and enhance knowledge.