Molecular genetics Flashcards
1
Q
How many Carbons are there in the sugar on the backbone of DNA? And what number carbon is the a) base b) phosphate attached to?
A
There are 5 carbons
a) base is attached to the C1
b) phosphate is attached to C5
2
Q
How many rings are in a) purines b) pyrimidine’s?
A
a) 2
b) 1
3
Q
Which bases are purine and which are pyrimidine?
A
Purine - G and A
Pyrimidine - C, T and U
4
Q
Describe the type, how many and between which bases bonds occur
A
A-T = 2 hydrogen bonds C-G = 3 hydrogen bonds
5
Q
What bonds hold the DNA backbone together
A
Phosphodiester
6
Q
How many amino acids are found per turn in a DNA strand?
A
3.6
7
Q
How many nm is one full turn in a DNA helix?
A
3.4nm
8
Q
What direction does the DNA double helix turn?
A
right handed double helix
