DNA Flashcards
(22 cards)
DNA stands for
Deoxyribonucleic Acid
3 building blocks of DNA
Rectangle - Nitrogen base
Pentagon - Deoxyribose
Circle - Phosphate
DNA is a ___________________________
Organic compound, a type of NUCLEIC ACID
DNA contains the elements of _______
CHONP
The base sequence of DNA provides ___________________________________
The instructions for protein production in the cell
___________ united in the center of the molecule by hydrogen bonds
Nucleuotides
4 Nitrogen Bases
1 Adenine
2 Guanine
3 Thymine
4 Cytosine
Purines
Adenine and Guanine
Pyrimidines
Thymine and Cytosine
A pairs with ________
T pairs with ______
T
A
G pairs with______
C pairs with______
C
G
Prokaryote DNA
DNA exists as a single, circular chromosome called plasmid
Eukaryote DNA
DNA is coiled around a histone protein and takes on a linear shape forming chromosomes
Topoisomerase
Untwists DNA
DNA Helicase
Breaks hydrogen bonds between base pairs
Single Stranded Binding Proteins (SSBs)
Hold the 2 sides of the ladder apart during replication
DNA Primase
Alerts polymerase where to copy next
DNA Polymerase
Bonds new nucleotides according to base pairing rules
DNA Ligase “Glue”
Bonds okazaki fragments
Leading Strand Characteristics
Copies toward the replication fork
copies continuously
Lagging Strand Characteristics
Copies away from the replication fork
copies discontinuously (in fragments)
DNA 5 facts
1 Deoxyribonulceic acid
2 Sugar is deoxyribose
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