Chapter 10 Flashcards
1
Q
nucleotides have 3 components
A
- five member sugar ring (ribose or deoxiribose)
- a nitrogenous base (purine or pyrimidine
- phosphate
2
Q
purines and pyrimidine are
A
heterocyclic )contain carbon and nitrogen
3
Q
nucleosides names and nucleotdes names end in
A
-osine, idine,
ylate
4
Q
structure of deoxyadenosine
A
double N ring with NH2
5
Q
structure of deoxyguanosine
A
double N ring with double bonded O and NH2
6
Q
structure of deocythymidine
A
ring with CH3 and double bonded O
7
Q
structure of deoxycytidine
A
ring with double bonded O and NH2
8
Q
type of linkage in nucleotides
A
phosphodiester bonds
9
Q
the weak forces that stabilize the double helix
A
- hydrophobic effects
- van der Waals
- hydrogen bonds
- electrostatic repulsion
10
Q
restriction endonucleases
A
enzymes that recognize and cleave specific DNA sequences
11
Q
histones
A
major proteins of chromatin and positively charged proteins
12
Q
introns
A
sequences that interupt gene production
