Summary Nucleotides and nucleic acids Biology A level for OCR revision notes

, . 1 3 NUCLEOTIDES &
2 .




NUCLEIC ACID S ↳ wi nuchels
NUCLEOTIDE
e .
. DNA
g phosphate group
T RNA
O
ADD + ATD
# nitrogenous
base
This
an ou
group wi
iS



L ribose




-
Pentose sugar

DNA
·
codes for M
a sequence phosphate group
anrio
of
O/
acidsignc/X-nitrogenous code)
base
Bases :

L Deoxyribose
Adenie + Guarnie Sugar gene = section of DNA
purvie bases
= that contains complete
2 carbon-nitrogen sequence of bases
Chave rings)
thymine pyramidine
-




Cytosme + are bases (1 carbon-

nitrogen ruig)
It's a double helx shape-double stranded

RNA


uracie
phosphate group
replaces
O
X nitrogenous
-




enymee
as a base
base
RNA
swigle Stranded
is
L
ribose sugar




Phosphodiester bond la phosphate group + 2 ester
bonds) -
forms between pentose sugar phosphate
+


group of next nucleotide by a condensation
reaction .