Chapter 5 - quiz Flashcards
1
Q
pyridamines
A
- single ring
1. thymine
2. cytosine
2
Q
purines
A
- 2 rings
1. adenine
2. guanine
3
Q
thymine and adenine have ___ hydrogen bonds
A
2
4
Q
cytosine and guanine have ___ hydrogen bonds
A
3
5
Q
3’
A
- OH- group attached
- continuous
- hydroxyl end
- no DNA loss
- nucleotides attach here
6
Q
5’
A
- phosphate attached
- lagged replication of the 5’ end
- loss of DNA
7
Q
DNA replication
A
- process of producing 2 identical DNA molecules from an original (parent) DNA molecule
- occurs during S phase of interphase
8
Q
semi conservative replication
A
- one strand of parent DNA conserved and one is newly synthesized
- correct theory
9
Q
conservative replication
A
forms 2 new daughter strands from parental template
10
Q
dispersive
A
original DNA chunked and dispersed into the newly synthesized
11
Q
helicase
A
binds to DNA and unwinds double helix
12
Q
topiosomerase
A
relieves strain on the double helix being separated
13
Q
DNA Polymerase III
A
catalyses addition of new nucleotides
14
Q
RNA primase
A
adds small complementary RNA primer
15
Q
DNA polymerase II
A
excise incorrect base
