NUCLEOSIDES/NUCLEOTIDES

what are the components of a nucleoside?

5C sugar (ribose vs. deoxyribose) and nitrogenous base

how do you number a purine? where is the sugar attached?

number C1-9. Sugar attached at C9.

how do you number a pyrimidine? where is the sugar attached?

number C1-6. Sugar attached at C1

which are the purines? are they in DNA or RNA?

adenine and guanine both in DNA

which are the pyramidines? are they in DNA or RNA?

cytosine, thymine (both in DNA), and uracil (RNA)

what are the components of a nucleotide?

5C sugar, phosphate group, nitrogenous base

what is the difference between deoxyribose and ribose?

no oxygen in deoxyribose at C2

what are the 5 nucleosides?

(deoxy)cytidine (dC, C), (deoxy)adenosine (dA,A), uridine (U), deoxythimidine (dT), (deoxy)guanosine (dG, G)

which carbons can add phosphates on nucleotides?

5’ and 3’

what bond is responsible for the formation of polynucleotide strands in DNA and RNA?

phosphdiester bond between sugars

which purines pair with which pyrimidines? how many H-bonds are in each?

A-T (2), A-U (2), C-G (3)