unit 3 Flashcards
1
Q
DNA
A
stores genetic info
2
Q
dna shape
A
double helix (anti parallel) - 2 strands run parallel to eachother but w opposite alignments
3
Q
DNA is made up of:
A
- nitrogenous bases
- phosphate (deoxyribose)
- sugar (5c)
4
Q
4 types of nitrogenous bases:
A
adenine
thymine
guanine
cytosine
5
Q
things move and build from
A
move 3-5
build 5-3
6
Q
enzyme, dna ligase
A
linking enzyme joins strands (2 okazaki) joined w molecular and covalent bonding
7
Q
leaving strand:
A
- template strand of dna
- continuous addition of nitrogenous bases
- 5-3 direction and mcgraw hill replication fork
8
Q
lagging strand:
A
other dna strand
- dorms shirt strands of okazaki fragments that later join 5-3
9
Q
DNA polymerase 1
A
cuts off RNA primers and fills in w DNA between lagging strands
- can proof read gaps in lagging strand
10
Q
DNA polymerase 111
A
- elongated strand by adding nucleioids on leading strand
- also proof reads and corrects DNA strand
11
Q
single strand binding proteins:
A
stabilize DNA strands ad they are replicating
-prevents rejoining of DNA strands
