DNA Structure Flashcards
1
Q
What is a nucleotide?
A
the building block of DNA, composed of a nitrogenous base, phosphate group, and ribose
2
Q
What is an ester bond
A
the bond between phosphate group and number 5 carbon of ribose
3
Q
What is a nucleoside
A
a monomer of the nucleotide consisting of the nitrogenous base an sugar
4
Q
What are the two families of nitrogenous bases
A
pyrimidines (six-membered rings) and purines (six-membered ring fused to a five-membered ring)
5
Q
How are sugars different in DNA and RNA
A
DNA: deoxyribose
RNA: ribose
6
Q
What is Chargaff’s Rule
A
%A = %T %G = %C
7
Q
What are the purines
A
Adenine and Guanine
8
Q
What are the pyrimidines
A
Thymine, Cytosine, Uracil
