Structure Of Dna Flashcards
What is the composition of DNA
Composed of nucleotides. The nucleotide is the monomer
What is DNA?
A long stringy twisted molecule made up of nucleotides that stores genetic information
What are purines
Composed of two rings (long)
Adenine
Guanine
Pyrimidines
One ring (shorter)
Thymine
Cytosine
Uricil
Base pairing rule
Chargoffs rule
DNA contains equal percentages of A and T , G and C
A purine is paired with a pyrimidine
AT two hydrogen bonds forming a double bond
CG three hydrogen bonds forming a triple bond
What is DNA described as
A double helix
Consists of two long nucleotides twisted together
WATSON AND CRICK
Untwisted is ladder
The sides of ladder
Alternating deoxyribose sugars and phosphate groups held together by strong covalent bonds
Rungs of DNA
Made up of pairs of nitrogen bases
Where do the nucleotides attach
The sugar part
Functions of DNA
Codes for proteins and hormones to be made. Proteins result in genetic traits
Hormones result in body function
