Stability & Function of DNA (AQA A-Level Biology): Flashcards
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Practise the cards
10 cards from this deck
DNA structure shape
DNA structure shape
Double helix
Base that pairs with adenine
Base that pairs with adenine
Thymine
Base that pairs with cytosine
Base that pairs with cytosine
Guanine
No. of H-bonds in A-T pair
No. of H-bonds in A-T pair
Two
No. of H-bonds in C-G pair
No. of H-bonds in C-G pair
Three
More stable base pair: C-G or A-T?
More stable base pair: C-G or A-T?
C-G (has 3 H-bonds)
Three sources of DNA stability
Three sources of DNA stability
H-bonding, phosphodiester backbone, base stacking
Role of phosphodiester backbone
Role of phosphodiester backbone
Protects bases from damage
Primary function of DNA
Primary function of DNA
Hereditary material - stores genetic information
Base pairs in typical mammalian cell
Base pairs in typical mammalian cell
~3.2 billion