DNA structure Flashcards
DNA
Deoxyribo Nucleic Acid
Chromosomes composed of DNA
Four base pairs
Adenine, Guanine, Cytosine, Thymine
Complimentary Base Pairs
Adenine (A) always attached to thymine by two hydrogen bonds.
Guanine (G) always attached to cytosine by 3 hydrogen bonds.
Purine Base Pairs
Adenine & Guanine
Pyrimidines Base pairs
Cytosine & Thymine
Triplet/Codon
3 base in a sequence together
Double Helix
DNA, twisted structure (similar shape to a ladder) with
- Complimentary base pairs
- Phosphate and sugar groups forming vertical bias.
Nucleotide
General reoccurring sub-unit
Nucleotide DNA
P
\
D ___ NB
Nucleotide RNA
P
\
R ___ NB
DNA
Sugar?
Structure?
Location?
Sugar : Deoxyribose (5C)
Structure : Double-Stranded
Location : Nucleus, Mitochondria,
One type
RNA
Ribo Nucleic Acid
Sugar : Ribose (5C)
Structure : Single-Stranded
Base pairs: Thymine replaced with Uracil (U). Uracil forms complimentary base pair with adenine using 2 hydrogen bonds.
Locations : Nucleus, Ribosome, Cytoplasm
3 Types of RNA
Messenger RNA
Ribosomal RNA
Transfer RNA