Inheritance - DNA structure Flashcards
1
Q
what is DNA made of?
A
polymers of molecules called nucleotides
2
Q
3 main parts of a nucleotide
A
phosphate group (circle) is attached to a sugar molecule (pentagon) which is attached to the base (rectangle)
3
Q
what never changes in DNA?
A
phosphate group and sugar molecule
4
Q
how many bases are there?
A
4; A, C, G, T
5
Q
DNA contains ______ different nucleotides
A
four
6
Q
DNA strands are ________. what does this mean?
A
complementary. this means same bases always pair on opposite strands
7
Q
C always links to
A
G
8
Q
A always links to
A
T
