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1842572
DNA STRUCTURE
Description
A Level Biology Mind Map on DNA STRUCTURE, created by Olivia Farrow on 07/01/2015.
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biology
dna
bases
dna structure
a level
as
biology
a level
Mind Map by
Olivia Farrow
, updated more than 1 year ago
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Created by
Olivia Farrow
almost 10 years ago
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Resource summary
DNA STRUCTURE
Nucleotide structure -All combined through condensation reaction to form dinucleotide-
Pentose sugar - Deoxyribose
A phosphate
An organic base
Single Ring- Cytosine & Thymine
Double Ring- Adenine & Guanine
Pairing of Bases
Contain Nitrogen
Adenine & Guanine are double ring structures
Longer molecules
Thymine & Cytosine are single ring stuctures
Shorter molecules
Adenine is complementary to Thymine.
Two hydrogen bonds.
Each rung of DNA ladder must be the same length
Cytosine is complementary to Guanine.
Three hydrogen bonds.
Function of DNA
Very stable and can pass from generation to generation
Strands are joined by hydrogen bonds, allows them to separate during DNA replication and protein synthesis.
Carries immense amount of genetic material
Deoxyribose-phosphate backbone protects the genetic information from being corrupted by outside chemicals.
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