Nucleic Acids Flashcards
1
Q
What is the structure of a nucleotide?
A
- Base
- Pentose sugar
- Phosphate
2
Q
Which nucleotides and purines and which and pyrimidines? Which have two rings?
A
o Purine (2 Rings) Adenine Guanine o Pyrimidine Cytosine Thymine Uracil
3
Q
What makes up the structure of DNA and RNA?
A
- 5’ end (phosphate)
- 3’ end (OH)
- Phosphodiester linkages on backbone
4
Q
How many H bonds are between A and T? G and C?
A
- 2 H bonds between A and T
* 3 H bonds between G and C
5
Q
How is Z form DNA different to A and B form?
A
It is left handed
6
Q
What is the most common form of DNA?
A
B form
7
Q
What can allow DNA to bend back on itself?
A
• DNA can bend back on itself in vitro if it has palindromic sequences
8
Q
What allows RNA to have function?
A
- RNA can ben back and become functional
* Allows different conformation (e.g. tRNA, ribosome)