Lec 9: Nucleic Acids Flashcards
what link forms between a nucleobase and nucleoside?
β‐ N ‐glycosidic link
what is the difference between a pyramidine and a purine?
purines contain two carbon-nitrogen rings and four nitrogen atoms
where as
pyrimidines contain a single carbon-nitrogn ring and 2 nitrogen atoms
what are pyrimidine nucleotides? which base are pyrimidines?
Heterocyclic organic compounds consisting of a pyrimidine ring
cysosine (C), Uracil (U), thymine (T)
what are purine nucleotides? which bases are purines?
Heterocyclic organic compounds consisting of a pyrimidine ring fused to an imidazole ring
adenine (A), guanine (G)
name this molecule
ATP
name this molecule
name this molecule
datp
name this molecule
ddatp
what is GTP (Guanosine triphosphate) used for?
– Important in protein synthesis and cell signalling
what is meant when it said that DNA strands are antiparallel?
– Strands are read 5’ to 3’
– Complementary strands have asymmetric ends
what does this diagram show?
semiconservative replication
what is a karyotype?
the number and appearance of chromosomes in the nucleus of a eukaryotic cell.
what is the Central Dogma?
The central dogma states that information in nucleic acid can be perpetuated or transferred but the transfer of information into protein is irreversible”
