DNA and RNA Structure Flashcards
1
Q
Components of nucleotide
A
Nitrogenous base
Phosphate group
Pentose sugar
2
Q
Nucleoside
A
Base + sugar
3
Q
RNA pentose sugar’s 2’ carbon
A
Hydroxyl group (not present in DNA)
4
Q
Directionality of connection of nucleotides
A
Connect from 5’ carbon of one sugar to 3’ carbon of other sugar
Connected by 3’ to 5’ phosphodiester bond
5
Q
Pyrimidine bases
A
Cytosine
Uracil (RNA only)
Thymine (DNA only)
6
Q
Purine bases
A
Guanine
Adenine
7
Q
Chargaff’s rule
A
1:1 ratio of A:T and G:C
8
Q
of base pairs per turn of DNA helix
A
10 base pairs/turn
9
Q
B-DNA
A
Watson and Crick’s model
Right handed
10
Q
Grooves of DNA helix
A
Major groove and minor groove
Result from angle of glycosidic bond
11
Q
RNA serves as genetic material for…
A
Viruses
12
Q
Physical structure of RNA
A
Rarely linear Secondary structure (how it's folded) allows it to be recognized by other molecules such as proteins
