Structure of DNA Flashcards
1
Q
What is DNA made up of?
A
Two polynucleotides
double stranded
The strands are held together by hydrogen bonds between complementary bases.
2
Q
What are mononucleotides made of?
A
- phosphate
- deoxyribose
- base
3
Q
What are the types of bases in DNA
A
- thymine
- adenine
- guanine
- cytosine
4
Q
what do mononucleotides join together to create?
A
polynucleotides
5
Q
how do mononucleotides join?
A
via condensation reaction
held together by phosphodiester bonds.
6
Q
What does adenine pair with? How many hydrogen bonds hold them together?
A
thymine
2 hydrogen bonds
7
Q
What does guanine pair with? How many hydrogen bonds hold them together?
A
cytosine
3 hydrogen bonds
8
Q
What do the 2 strange form?
A
a double helix.
