neucleotides Flashcards
what is a 5 carbon sugar called
pentose sugar
what are all the bases in DNA called
thynine adanine guanine cytosine
what bases are known as pyramidines
cytosine and thynine
what base does DNA have that RNA doesnt
thymine
what bases are known as purenes
adanine and guanine
whats the pentose sugar in RNA called
ribose
whats the pentose sugar in DNA
deoxyribose
what base does RNA have that DNA doesnt
uracil
what is the bond between 2 neuclotides called
a phosphodiester bond
what are all the bases in RNA called
uracil guanine adanine cytosine
discribe the structure of a DNA molecule
DNA contains a pentose sugar phosphate group and a base (thymine, cytosine, adanine and guanine) the phosphate is attatched to the 5 carbon of the sugar (phosphodiester bond) base is attatched to the 1 carbon of the sugar (glycosidic bond)
Explain how nucleotides are joined together in a DNA molecule.
a bond forms between the sugar group of one DNA molecule and the phosphate group of another forming a diesterphosphate group
this forms the sugar phosphate backbone of DNA
Compare the structures of DNA and RNA nucleotides.
DNA bases are thymine adanine guanine and cytosine
RNA bases are guanine adanine thymine and uracil
DNA is double stranded RNA is single stranded
a purene always joins to a …………
pyramidene
phosphodiester bonds form by a …….. reaction
condensation
